12657644 has 12 divisors (see below), whose sum is σ = 22264704. Its totient is φ = 6296304.

The previous prime is 12657637. The next prime is 12657691. The reversal of 12657644 is 44675621.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 7244 + ... + 8819.

It is an arithmetic number, because the mean of its divisors is an integer number (1855392).

Almost surely, 2^12657644 is an apocalyptic number.

It is an amenable number.

12657644 is a deficient number, since it is larger than the sum of its proper divisors (9607060).

12657644 is a wasteful number, since it uses less digits than its factorization.

12657644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16264 (or 16262 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 12657644 is about 3557.7582829641. The cubic root of 12657644 is about 233.0509936465.

The spelling of 12657644 in words is "twelve million, six hundred fifty-seven thousand, six hundred forty-four".