12972156 has 24 divisors (see below), whose sum is σ = 32049360. Its totient is φ = 4069632.

The previous prime is 12972149. The next prime is 12972217. The reversal of 12972156 is 65127921.

It is a congruent number.

It is an unprimeable number.

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, 31591 + ... + 31998.

It is an arithmetic number, because the mean of its divisors is an integer number (1335390).

Almost surely, 2^12972156 is an apocalyptic number.

It is an amenable number.

12972156 is an abundant number, since it is smaller than the sum of its proper divisors (19077204).

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

12972156 is a wasteful number, since it uses less digits than its factorization.

12972156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63613 (or 63611 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 12972156 is about 3601.6879376204. The cubic root of 12972156 is about 234.9654755378.

The spelling of 12972156 in words is "twelve million, nine hundred seventy-two thousand, one hundred fifty-six".