13981172 has 6 divisors (see below), whose sum is σ = 24467058. Its totient is φ = 6990584.

The previous prime is 13981147. The next prime is 13981193. The reversal of 13981172 is 27118931.

It can be written as a sum of positive squares in only one way, i.e., 13942756 + 38416 = 3734^2 + 196^2 .

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, 1747643 + ... + 1747650.

It is an arithmetic number, because the mean of its divisors is an integer number (4077843).

Almost surely, 2^13981172 is an apocalyptic number.

It is an amenable number.

13981172 is a deficient number, since it is larger than the sum of its proper divisors (10485886).

13981172 is a wasteful number, since it uses less digits than its factorization.

13981172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495297 (or 3495295 counting only the distinct ones).

The product of its digits is 3024, while the sum is 32.

The square root of 13981172 is about 3739.1405429590. The cubic root of 13981172 is about 240.9061347124.

The spelling of 13981172 in words is "thirteen million, nine hundred eighty-one thousand, one hundred seventy-two".