13931265 has 32 divisors (see below), whose sum is σ = 23003136. Its totient is φ = 7197120.

The previous prime is 13931221. The next prime is 13931287. The reversal of 13931265 is 56213931.

It is not a de Polignac number, because 13931265 - 2¹⁶ = 13865729 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109632 + ... + 109758.

It is an arithmetic number, because the mean of its divisors is an integer number (718848).

Almost surely, 2^13931265 is an apocalyptic number.

13931265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13931265 is a deficient number, since it is larger than the sum of its proper divisors (9071871).

13931265 is a wasteful number, since it uses less digits than its factorization.

13931265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309.

The product of its digits is 4860, while the sum is 30.

The square root of 13931265 is about 3732.4609843909. The cubic root of 13931265 is about 240.6191478871.

It can be divided in two parts, 13931 and 265, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13931265 in words is "thirteen million, nine hundred thirty-one thousand, two hundred sixty-five".