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.