13981185 has 12 divisors (see below), whose sum is σ = 24234132. Its totient is φ = 7456608.

The previous prime is 13981147. The next prime is 13981193. The reversal of 13981185 is 58118931.

It can be written as a sum of positive squares in 2 ways, for example, as 5875776 + 8105409 = 2424^2 + 2847^2 .

It is not a de Polignac number, because 13981185 - 2¹⁷ = 13850113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155302 + ... + 155391.

It is an arithmetic number, because the mean of its divisors is an integer number (2019511).

Almost surely, 2^13981185 is an apocalyptic number.

13981185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13981185 is a deficient number, since it is larger than the sum of its proper divisors (10252947).

13981185 is a wasteful number, since it uses less digits than its factorization.

13981185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310704 (or 310701 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 13981185 is about 3739.1422813260. The cubic root of 13981185 is about 240.9062093790.

The spelling of 13981185 in words is "thirteen million, nine hundred eighty-one thousand, one hundred eighty-five".