13253865 has 32 divisors (see below), whose sum is σ = 22692096. Its totient is φ = 6589440.

The previous prime is 13253861. The next prime is 13253879. The reversal of 13253865 is 56835231.

It is not a de Polignac number, because 13253865 - 2² = 13253861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13253861) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13677 + ... + 14613.

It is an arithmetic number, because the mean of its divisors is an integer number (709128).

Almost surely, 2^13253865 is an apocalyptic number.

13253865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13253865 is a deficient number, since it is larger than the sum of its proper divisors (9438231).

13253865 is a wasteful number, since it uses less digits than its factorization.

13253865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009.

The product of its digits is 21600, while the sum is 33.

The square root of 13253865 is about 3640.5858045100. The cubic root of 13253865 is about 236.6541806104.

The spelling of 13253865 in words is "thirteen million, two hundred fifty-three thousand, eight hundred sixty-five".