12391372 has 24 divisors (see below), whose sum is σ = 24922016. Its totient is φ = 5280768.

The previous prime is 12391369. The next prime is 12391373. The reversal of 12391372 is 27319321.

It is a super-2 number, since 2×12391372² = 307092200084768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 12391372.

It is not an unprimeable number, because it can be changed into a prime (12391373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4258 + ... + 6550.

Almost surely, 2^12391372 is an apocalyptic number.

It is an amenable number.

12391372 is an abundant number, since it is smaller than the sum of its proper divisors (12530644).

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

12391372 is a wasteful number, since it uses less digits than its factorization.

12391372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2495 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 12391372 is about 3520.1380654741. The cubic root of 12391372 is about 231.4052094634.

The spelling of 12391372 in words is "twelve million, three hundred ninety-one thousand, three hundred seventy-two".