12931312 has 20 divisors (see below), whose sum is σ = 25116696. Its totient is φ = 6449600.

The previous prime is 12931297. The next prime is 12931319. The reversal of 12931312 is 21313921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12931319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8187 + ... + 9637.

Almost surely, 2^12931312 is an apocalyptic number.

It is an amenable number.

12931312 is a deficient number, since it is larger than the sum of its proper divisors (12185384).

12931312 is a wasteful number, since it uses less digits than its factorization.

12931312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016 (or 2010 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 12931312 is about 3596.0133481399. The cubic root of 12931312 is about 234.7186129550.

The spelling of 12931312 in words is "twelve million, nine hundred thirty-one thousand, three hundred twelve".