12945904 has 20 divisors (see below), whose sum is σ = 25267480. Its totient is φ = 6425280.

The previous prime is 12945871. The next prime is 12945917. The reversal of 12945904 is 40954921.

It is a self number, because there is not a number n which added to its sum of digits gives 12945904.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 687 + ... + 5134.

It is an arithmetic number, because the mean of its divisors is an integer number (1263374).

Almost surely, 2^12945904 is an apocalyptic number.

It is an amenable number.

12945904 is a deficient number, since it is larger than the sum of its proper divisors (12321576).

12945904 is a wasteful number, since it uses less digits than its factorization.

12945904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968 (or 5962 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12945904 is about 3598.0416895862. The cubic root of 12945904 is about 234.8068671223.

The spelling of 12945904 in words is "twelve million, nine hundred forty-five thousand, nine hundred four".