# Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

## Unique Properties of 142

- 142 is the smallest semiprime (having exactly 2 prime factors), whose sum of divisors is a cube
- 142 is the alphanumeric value of ELEVENTYONE
- 142 is the smallest integer n such that the sum of cubes of digits of n equals the sum of prime divisors of n

## Common Properties of 142

A positive integer greater than 1 that is not prime is called *composite*.

Composite numbers are opposite to prime numbers.

The number n is *deficient* if the sum of all its positive divisors except itself is less than n.

Compare with perfect and abundant numbers.

A number is *even* if it is divisible by 2.

Numbers that are not even are odd. Compare with another pair -- evil and odious numbers.

The number n is *evil* if it has an even number of 1's in its binary expansion.

Guess what odious numbers are.

A number is said to be *square-free* if its prime decomposition contains no repeated factors.