13431265 has 16 divisors (see below), whose sum is σ = 16632000. Its totient is φ = 10406592.

The previous prime is 13431251. The next prime is 13431323. The reversal of 13431265 is 56213431.

13431265 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13431265 - 2⁷ = 13431137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38311 + ... + 38659.

It is an arithmetic number, because the mean of its divisors is an integer number (1039500).

Almost surely, 2^13431265 is an apocalyptic number.

It is an amenable number.

13431265 is a deficient number, since it is larger than the sum of its proper divisors (3200735).

13431265 is a wasteful number, since it uses less digits than its factorization.

13431265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576.

The product of its digits is 2160, while the sum is 25.

The square root of 13431265 is about 3664.8690290377. The cubic root of 13431265 is about 237.7053588542.

Adding to 13431265 its reverse (56213431), we get a palindrome (69644696).

The spelling of 13431265 in words is "thirteen million, four hundred thirty-one thousand, two hundred sixty-five".