12987272 has 16 divisors (see below), whose sum is σ = 25410240. Its totient is φ = 6211216.

The previous prime is 12987253. The next prime is 12987307. The reversal of 12987272 is 27278921.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35108 + ... + 35475.

It is an arithmetic number, because the mean of its divisors is an integer number (1588140).

Almost surely, 2^12987272 is an apocalyptic number.

It is an amenable number.

12987272 is a deficient number, since it is larger than the sum of its proper divisors (12422968).

12987272 is a wasteful number, since it uses less digits than its factorization.

12987272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70612 (or 70608 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 12987272 is about 3603.7857871966. The cubic root of 12987272 is about 235.0567057966.

The spelling of 12987272 in words is "twelve million, nine hundred eighty-seven thousand, two hundred seventy-two".