13921372 has 12 divisors (see below), whose sum is σ = 24441480. Its totient is φ = 6938096.

The previous prime is 13921333. The next prime is 13921373. The reversal of 13921372 is 27312931.

13921372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13921372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4222 + ... + 6757.

It is an arithmetic number, because the mean of its divisors is an integer number (2036790).

Almost surely, 2^13921372 is an apocalyptic number.

It is an amenable number.

13921372 is a deficient number, since it is larger than the sum of its proper divisors (10520108).

13921372 is a wasteful number, since it uses less digits than its factorization.

13921372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11300 (or 11298 counting only the distinct ones).

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

The square root of 13921372 is about 3731.1354840048. The cubic root of 13921372 is about 240.5621774941.

The spelling of 13921372 in words is "thirteen million, nine hundred twenty-one thousand, three hundred seventy-two".