# Fun With Numbers

My friend Katherine pointed me to the Number Gossip site. If you like numbers, you’ll quickly lose the next hour playing around. Since 49% of the US is taking today off, it seemed like a relevant thing to spend some time on.

For example, did you know that 67 is the only number such that the common alphabetical value of its Roman representation is equal to its reversal (LXVII – 12+24+22+9+9=76)?

Or, did you know that 111 is the smallest palindromic number such that the sum of its digits is one of its prime factors? It’s also the age at which Bilbo Baggins leaves the Shire.

I had forgotten that evil numbers are a number that has an even number of 1’s in its binary expansion. But, I didn’t know what an odious number is (it has an odd number of 1’s in its binary expansion.) Apparently, being evil is related, but the opposite, of being odious.

While we all know that 42 is the answer to the ultimate question of life, the universe and everything as calculated by Deep Thought, did you know it is also the number spots on a pair of dice? It’s also the smallest abundant odious number.

Have fun. Don’t forget to come up for air once in a while.