12555972 has 120 divisors (see below), whose sum is σ = 38704512. Its totient is φ = 3499200.

The previous prime is 12555947. The next prime is 12555989. The reversal of 12555972 is 27955521.

12555972 is a `hidden beast` number, since 12 + 55 + 597 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (31500) is a multiple of the sum of its prime divisors (300).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46197 + ... + 46467.

Almost surely, 2^12555972 is an apocalyptic number.

12555972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12555972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19352256).

12555972 is an abundant number, since it is smaller than the sum of its proper divisors (26148540).

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

12555972 is a wasteful number, since it uses less digits than its factorization.

12555972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 300 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 12555972 is about 3543.4407007879. The cubic root of 12555972 is about 232.4253246132.

It can be divided in two parts, 1255 and 5972, that added together give a palindrome (7227).

The spelling of 12555972 in words is "twelve million, five hundred fifty-five thousand, nine hundred seventy-two".