12972436 has 6 divisors (see below), whose sum is σ = 22701770. Its totient is φ = 6486216.

The previous prime is 12972371. The next prime is 12972457. The reversal of 12972436 is 63427921.

12972436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8088336 + 4884100 = 2844^2 + 2210^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621551 + ... + 1621558.

Almost surely, 2^12972436 is an apocalyptic number.

It is an amenable number.

12972436 is a deficient number, since it is larger than the sum of its proper divisors (9729334).

12972436 is a wasteful number, since it uses less digits than its factorization.

12972436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243113 (or 3243111 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 12972436 is about 3601.7268080741. The cubic root of 12972436 is about 234.9671660782.

The spelling of 12972436 in words is "twelve million, nine hundred seventy-two thousand, four hundred thirty-six".