13138565 has 8 divisors (see below), whose sum is σ = 17199648. Its totient is φ = 9555280.

The previous prime is 13138561. The next prime is 13138571. The reversal of 13138565 is 56583131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13138565 - 2² = 13138561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119387 + ... + 119496.

It is an arithmetic number, because the mean of its divisors is an integer number (2149956).

Almost surely, 2^13138565 is an apocalyptic number.

It is an amenable number.

13138565 is a deficient number, since it is larger than the sum of its proper divisors (4061083).

13138565 is a wasteful number, since it uses less digits than its factorization.

13138565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238899.

The product of its digits is 10800, while the sum is 32.

The square root of 13138565 is about 3624.7158509323. The cubic root of 13138565 is about 235.9659351867.

The spelling of 13138565 in words is "thirteen million, one hundred thirty-eight thousand, five hundred sixty-five".