12915864 has 48 divisors (see below), whose sum is σ = 37674000. Its totient is φ = 3973824.

The previous prime is 12915821. The next prime is 12915883. The reversal of 12915864 is 46851921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5964 + ... + 7835.

It is an arithmetic number, because the mean of its divisors is an integer number (784875).

Almost surely, 2^12915864 is an apocalyptic number.

It is an amenable number.

12915864 is an abundant number, since it is smaller than the sum of its proper divisors (24758136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12915864 is a wasteful number, since it uses less digits than its factorization.

12915864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13824 (or 13817 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 12915864 is about 3593.8647720803. The cubic root of 12915864 is about 234.6251092187.

The spelling of 12915864 in words is "twelve million, nine hundred fifteen thousand, eight hundred sixty-four".