My Favorite Number

Non-prime, that is, would have to be

1,001.

Why?

First, it’s the product of three consecutive prime numbers, 7, 11, and 13.

Which gives it the neat property that follows:

Take any three-digit number and multiply it by 7, then 11, then 13.

What do you get?

That exact same three-digit number appearing twice in the product.

So, 123 x 7 x 11 x 13 = 123,123.

999 x 7 x 11 x 13 = 999,999.

Not supremely practical, but interesting nonetheless.

It’s also the first four-digit palindromic number (reads the same front-to-back as back-to-front).

Finally, 1,001 is binary for the decimal number 9, which is the number of my daughter’s jersey on her soccer team.

I will now let you resume your normal daily lives.