13981165 has 16 divisors (see below), whose sum is σ = 18398016. Its totient is φ = 10115200.

The previous prime is 13981147. The next prime is 13981193. The reversal of 13981165 is 56118931.

It is not a de Polignac number, because 13981165 - 2⁹ = 13980653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13981165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12270 + ... + 13360.

It is an arithmetic number, because the mean of its divisors is an integer number (1149876).

Almost surely, 2^13981165 is an apocalyptic number.

It is an amenable number.

13981165 is a deficient number, since it is larger than the sum of its proper divisors (4416851).

13981165 is a wasteful number, since it uses less digits than its factorization.

13981165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340.

The product of its digits is 6480, while the sum is 34.

The square root of 13981165 is about 3739.1396069149. The cubic root of 13981165 is about 240.9060945073.

It can be divided in two parts, 139811 and 65, that added together give a square (139876 = 374²).

The spelling of 13981165 in words is "thirteen million, nine hundred eighty-one thousand, one hundred sixty-five".