12678656 has 20 divisors (see below), whose sum is σ = 25333572. Its totient is φ = 6339072.

The previous prime is 12678649. The next prime is 12678661. The reversal of 12678656 is 65687621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11870 + ... + 12893.

Almost surely, 2^12678656 is an apocalyptic number.

12678656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12678656 is a deficient number, since it is larger than the sum of its proper divisors (12654916).

12678656 is an frugal number, since it uses more digits than its factorization.

12678656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24781 (or 24765 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 12678656 is about 3560.7100415507. The cubic root of 12678656 is about 233.1798791467.

The spelling of 12678656 in words is "twelve million, six hundred seventy-eight thousand, six hundred fifty-six".