13131265 has 12 divisors (see below), whose sum is σ = 18330516. Its totient is φ = 9004128.

The previous prime is 13131257. The next prime is 13131271. The reversal of 13131265 is 56213131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8809024 + 4322241 = 2968^2 + 2079^2 .

It is not a de Polignac number, because 13131265 - 2³ = 13131257 is a prime.

It is a Duffinian number.

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, 26554 + ... + 27043.

It is an arithmetic number, because the mean of its divisors is an integer number (1527543).

Almost surely, 2^13131265 is an apocalyptic number.

It is an amenable number.

13131265 is a deficient number, since it is larger than the sum of its proper divisors (5199251).

13131265 is an equidigital number, since it uses as much as digits as its factorization.

13131265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53616 (or 53609 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 13131265 is about 3623.7087355360. The cubic root of 13131265 is about 235.9222249222.

Adding to 13131265 its reverse (56213131), we get a palindrome (69344396).

It can be divided in two parts, 1313126 and 5, that added together give a palindrome (1313131).

The spelling of 13131265 in words is "thirteen million, one hundred thirty-one thousand, two hundred sixty-five".