12591664 has 10 divisors (see below), whose sum is σ = 24396380. Its totient is φ = 6295824.

The previous prime is 12591659. The next prime is 12591671. The reversal of 12591664 is 46619521.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393474 + ... + 393505.

It is an arithmetic number, because the mean of its divisors is an integer number (2439638).

Almost surely, 2^12591664 is an apocalyptic number.

It is an amenable number.

12591664 is a deficient number, since it is larger than the sum of its proper divisors (11804716).

12591664 is an equidigital number, since it uses as much as digits as its factorization.

12591664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786987 (or 786981 counting only the distinct ones).

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

The square root of 12591664 is about 3548.4734746085. The cubic root of 12591664 is about 232.6453494352.

The spelling of 12591664 in words is "twelve million, five hundred ninety-one thousand, six hundred sixty-four".