12507931 has 2 divisors, whose sum is σ = 12507932. Its totient is φ = 12507930.

The previous prime is 12507923. The next prime is 12507953. The reversal of 12507931 is 13970521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12507931 - 2³ = 12507923 is a prime.

It is a super-2 number, since 2×12507931² = 312896675801522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12507931.

It is not a weakly prime, because it can be changed into another prime (12507031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253965 + 6253966.

It is an arithmetic number, because the mean of its divisors is an integer number (6253966).

Almost surely, 2^12507931 is an apocalyptic number.

12507931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12507931 is an equidigital number, since it uses as much as digits as its factorization.

12507931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 12507931 is about 3536.6553408553. The cubic root of 12507931 is about 232.1285145582.

The spelling of 12507931 in words is "twelve million, five hundred seven thousand, nine hundred thirty-one".