12591916 has 24 divisors (see below), whose sum is σ = 23123520. Its totient is φ = 5991552.

The previous prime is 12591907. The next prime is 12591919. The reversal of 12591916 is 61919521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12591919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7725 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (963480).

Almost surely, 2^12591916 is an apocalyptic number.

It is an amenable number.

12591916 is a deficient number, since it is larger than the sum of its proper divisors (10531604).

12591916 is a wasteful number, since it uses less digits than its factorization.

12591916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593 (or 1591 counting only the distinct ones).

The product of its digits is 4860, while the sum is 34.

The square root of 12591916 is about 3548.5089826574. The cubic root of 12591916 is about 232.6469014207.

The spelling of 12591916 in words is "twelve million, five hundred ninety-one thousand, nine hundred sixteen".