12965556 has 12 divisors (see below), whose sum is σ = 30252992. Its totient is φ = 4321848.

The previous prime is 12965551. The next prime is 12965567. The reversal of 12965556 is 65556921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12965551) 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 3 ways as a sum of consecutive naturals, for example, 540220 + ... + 540243.

Almost surely, 2^12965556 is an apocalyptic number.

It is an amenable number.

12965556 is an abundant number, since it is smaller than the sum of its proper divisors (17287436).

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

12965556 is a wasteful number, since it uses less digits than its factorization.

12965556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080470 (or 1080468 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 12965556 is about 3600.7715839803. The cubic root of 12965556 is about 234.9256200397.

The spelling of 12965556 in words is "twelve million, nine hundred sixty-five thousand, five hundred fifty-six".