12645931 has 2 divisors, whose sum is σ = 12645932. Its totient is φ = 12645930.

The previous prime is 12645911. The next prime is 12645947. The reversal of 12645931 is 13954621.

12645931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12645931 - 2⁹ = 12645419 is a prime.

It is a super-2 number, since 2×12645931² = 319839141713522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12645893 and 12645902.

It is not a weakly prime, because it can be changed into another prime (12645901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322965 + 6322966.

It is an arithmetic number, because the mean of its divisors is an integer number (6322966).

Almost surely, 2^12645931 is an apocalyptic number.

12645931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645931 is an equidigital number, since it uses as much as digits as its factorization.

12645931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 12645931 is about 3556.1117811452. Note that the first 3 decimals coincide. The cubic root of 12645931 is about 232.9790853534.

The spelling of 12645931 in words is "twelve million, six hundred forty-five thousand, nine hundred thirty-one".