12656478 has 16 divisors (see below), whose sum is σ = 25390080. Its totient is φ = 4205976.

The previous prime is 12656477. The next prime is 12656519. The reversal of 12656478 is 87465621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958 + ... + 5121.

It is an arithmetic number, because the mean of its divisors is an integer number (1586880).

Almost surely, 2^12656478 is an apocalyptic number.

12656478 is an abundant number, since it is smaller than the sum of its proper divisors (12733602).

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

12656478 is a wasteful number, since it uses less digits than its factorization.

12656478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6431.

The product of its digits is 80640, while the sum is 39.

The square root of 12656478 is about 3557.5944119587. The cubic root of 12656478 is about 233.0438373436.

The spelling of 12656478 in words is "twelve million, six hundred fifty-six thousand, four hundred seventy-eight".