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usonian

(13,796 posts)
Fri Aug 25, 2023, 12:28 AM Aug 2023

Math fact of the day. 1135809 is an odd composite number composed of four prime numbers multiplied together.

https://numbermatics.com/n/1135809/

Which ones?

https://www.calculatorsoup.com/calculators/math/prime-factors.php

3 x 3 x 3 x 23 x 31 x 59

All Factors of 01135809:
1, 3, 9, 23, 27, 31, 59, 69, 93, 177, 207, 279, 531, 621, 713, 837, 1357, 1593, 1829, 2139, 4071, 5487, 6417, 12213, 16461, 19251, 36639, 42067, 49383, 126201, 378603, 1135809

Warning to iPhone owners: If you click on the composite number, the phone will offer to make a phone call.
Adding a leading zero didn’t help. That’s also some kind of phone number.
Life is weird.
19 replies = new reply since forum marked as read
Highlight: NoneDon't highlight anything 5 newestHighlight 5 most recent replies
Math fact of the day. 1135809 is an odd composite number composed of four prime numbers multiplied together. (Original Post) usonian Aug 2023 OP
"odd" used in this sense means that it is not an even number. n/t John1956PA Aug 2023 #1
All prime numbers are odd numbers, except for the number "2". Enter stage left Aug 2023 #2
Yes. Of course, as we all know 1135809 is not a prime number. John1956PA Aug 2023 #3
I understand, but probably 75-80% of people don't know that... Enter stage left Aug 2023 #4
I knew that! ShazzieB Aug 2023 #16
I copied and pasted that from the first website verbatim. usonian Aug 2023 #5
Yes, I always knew that the choice of words was theirs, not yours. John1956PA Aug 2023 #7
I figured that. No prob. usonian Aug 2023 #8
Right after the booking, I jumped on the mathematics of the number. John1956PA Aug 2023 #10
Message auto-removed Name removed Aug 2023 #12
Wow! Even the decimals have significance. John1956PA Aug 2023 #13
Post removed Post removed Aug 2023 #14
Sounds serious. Torchlight Aug 2023 #15
Hi, Torchlight. I am surprised the post (and maybe the poster) which I replied to got removed. John1956PA Aug 2023 #17
This message was self-deleted by its author John1956PA Aug 2023 #18
Hi, Torchlight. I have been meaning to reply to you, but my post keeps winding up in the wrong spot. John1956PA Aug 2023 #19
An interesting number. All of the digits except 9 are Fibonacci numbers and are... NNadir Aug 2023 #6
This message was self-deleted by its author John1956PA Aug 2023 #9
The sum of the digits is the 3rd power of 3. Jim__ Aug 2023 #11

John1956PA

(3,368 posts)
3. Yes. Of course, as we all know 1135809 is not a prime number.
Fri Aug 25, 2023, 01:06 AM
Aug 2023

In my reply above, I pointed out that the use of the word "odd" in the OP referred to the fact that it is not an even number. At first blush reading the OP, I thought that it was trying to convey the notion that there is something peculiar about the number. My intention was to clarify that "odd" was not being used in that sense.

Enter stage left

(3,823 posts)
4. I understand, but probably 75-80% of people don't know that...
Fri Aug 25, 2023, 01:16 AM
Aug 2023

Even numbers can't be prime numbers, maybe lesser percentages of DU members.

It's a sad fact of our education system today & the right is trying their hardest to make it worse.

Fight for education!

ShazzieB

(18,656 posts)
16. I knew that!
Thu Aug 31, 2023, 10:39 AM
Aug 2023

Math was always my worst subject in school, and I've always felt like a failure at it, but I knew that. Go figure.

I don't feel so dumb after all!

John1956PA

(3,368 posts)
7. Yes, I always knew that the choice of words was theirs, not yours.
Fri Aug 25, 2023, 07:09 AM
Aug 2023

After posting my comment about "OP" it crossed my mind that it seemed that I was blaming you for the word choice. Regardless, I am glad that you posted the piece. I learned about the site which factors large numbers and displays their roots.

usonian

(13,796 posts)
8. I figured that. No prob.
Fri Aug 25, 2023, 07:44 AM
Aug 2023

I was having some fun with that number ( I presume you know its relevance, Georgia-wise)

The post was part of one that got taken down because I also mentioned that it's the part number of a pack of mop heads, and presumably (?) I was selling the mop heads. .

Hey, the math fact is so cool that it stands alone.

I found "NUMBER The Language of Science" early on. Never amounted to much in math. Just enough.

Life in the weird lane. It's fun. Not everyone understands. Their problem, not mine.

John1956PA

(3,368 posts)
10. Right after the booking, I jumped on the mathematics of the number.
Fri Aug 25, 2023, 08:01 AM
Aug 2023

I posted a reply which reads, "Not a prime number." I was aiming for the type of disconnected side comments 45 makes when he is rambling. The mop "part number" removal which your original post experienced is amusing. Upthread, there was a comment that all the digits are primes or powers of primes. I do not think that is significant, since the number 6 is the only digit which exists and does not fit that description. It is fun to kick around number trivia based upon lessons which we all learned so long ago in math class.



Response to John1956PA (Reply #10)

John1956PA

(3,368 posts)
13. Wow! Even the decimals have significance.
Thu Aug 31, 2023, 08:34 AM
Aug 2023

Your analysis is going to run in my memory like a repeating decimal. Thanks for posting!

Response to John1956PA (Reply #13)

John1956PA

(3,368 posts)
17. Hi, Torchlight. I am surprised the post (and maybe the poster) which I replied to got removed.
Thu Aug 31, 2023, 12:19 PM
Aug 2023

The poster wrote that 1135809 divided by 2024 is 561.170454545. The purpose of my comment was to thank him for pointing this out and to make an attempted humorous reference about the fact that the decimal contains two repeating digits (which, of course, run out to infinity). Oh well, in any case, there has probably been enough discussion about the number 1135809.

Response to Torchlight (Reply #15)

NNadir

(34,662 posts)
6. An interesting number. All of the digits except 9 are Fibonacci numbers and are...
Fri Aug 25, 2023, 05:33 AM
Aug 2023

primes or powers of primes.

The sum of the digits is the 4th power of 3.

Response to NNadir (Reply #6)

Jim__

(14,456 posts)
11. The sum of the digits is the 3rd power of 3.
Mon Aug 28, 2023, 09:07 PM
Aug 2023

As noted in the cited article, 1135809 is a harshad number, and, of course, 27 divides 1135809, as can be seen from the list of its prime components: 3 x 3 x 3 x 23 x 31 x 59 = (3 x 3 x 3) x 23 x 31 x 59.

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