12636972 has 36 divisors (see below), whose sum is σ = 33129096. Its totient is φ = 4212000.

The previous prime is 12636971. The next prime is 12636973. The reversal of 12636972 is 27963621.

12636972 is a `hidden beast` number, since 12 + 636 + 9 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (12636971) and next prime (12636973).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12636972² = 319386122657568, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12636971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5529 + ... + 7472.

Almost surely, 2^12636972 is an apocalyptic number.

12636972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12636972 is an abundant number, since it is smaller than the sum of its proper divisors (20492124).

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

12636972 is a wasteful number, since it uses less digits than its factorization.

12636972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13020 (or 13006 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 12636972 is about 3554.8518956491. The cubic root of 12636972 is about 232.9240544051.

The spelling of 12636972 in words is "twelve million, six hundred thirty-six thousand, nine hundred seventy-two".