12972688 has 20 divisors (see below), whose sum is σ = 25270828. Its totient is φ = 6451200.

The previous prime is 12972671. The next prime is 12972689. The reversal of 12972688 is 88627921.

It can be written as a sum of positive squares in 2 ways, for example, as 1763584 + 11209104 = 1328^2 + 3348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12972689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988 + ... + 5188.

Almost surely, 2^12972688 is an apocalyptic number.

It is an amenable number.

12972688 is a deficient number, since it is larger than the sum of its proper divisors (12298140).

12972688 is a wasteful number, since it uses less digits than its factorization.

12972688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402 (or 4396 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 12972688 is about 3601.7617911239. The cubic root of 12972688 is about 234.9686875437.

The spelling of 12972688 in words is "twelve million, nine hundred seventy-two thousand, six hundred eighty-eight".