13391572 has 6 divisors (see below), whose sum is σ = 23435258. Its totient is φ = 6695784.

The previous prime is 13391551. The next prime is 13391621. The reversal of 13391572 is 27519331.

13391572 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., 7650756 + 5740816 = 2766^2 + 2396^2 .

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, 1673943 + ... + 1673950.

Almost surely, 2^13391572 is an apocalyptic number.

It is an amenable number.

13391572 is a deficient number, since it is larger than the sum of its proper divisors (10043686).

13391572 is a wasteful number, since it uses less digits than its factorization.

13391572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347897 (or 3347895 counting only the distinct ones).

The product of its digits is 5670, while the sum is 31.

The square root of 13391572 is about 3659.4496854035. The cubic root of 13391572 is about 237.4709667187.

The spelling of 13391572 in words is "thirteen million, three hundred ninety-one thousand, five hundred seventy-two".