12905616 has 40 divisors (see below), whose sum is σ = 33484960. Its totient is φ = 4283136.

The previous prime is 12905603. The next prime is 12905639. The reversal of 12905616 is 61650921.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14595 + ... + 15453.

It is an arithmetic number, because the mean of its divisors is an integer number (837124).

Almost surely, 2^12905616 is an apocalyptic number.

12905616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12905616 is an abundant number, since it is smaller than the sum of its proper divisors (20579344).

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

12905616 is a wasteful number, since it uses less digits than its factorization.

12905616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 12905616 is about 3592.4387259910. The cubic root of 12905616 is about 234.5630389272.

The spelling of 12905616 in words is "twelve million, nine hundred five thousand, six hundred sixteen".