12956931 has 24 divisors (see below), whose sum is σ = 20507760. Its totient is φ = 7834176.

The previous prime is 12956927. The next prime is 12956947. The reversal of 12956931 is 13965921.

It is not a de Polignac number, because 12956931 - 2² = 12956927 is a prime.

It is a super-2 number, since 2×12956931² = 335764121877522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12956131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5965 + ... + 7841.

It is an arithmetic number, because the mean of its divisors is an integer number (854490).

Almost surely, 2^12956931 is an apocalyptic number.

12956931 is a deficient number, since it is larger than the sum of its proper divisors (7550829).

12956931 is a wasteful number, since it uses less digits than its factorization.

12956931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1952 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 12956931 is about 3599.5737247624. The cubic root of 12956931 is about 234.8735157582.

It can be divided in two parts, 129569 and 31, that added together give a square (129600 = 360²).

The spelling of 12956931 in words is "twelve million, nine hundred fifty-six thousand, nine hundred thirty-one".