13572865 has 4 divisors (see below), whose sum is σ = 16287444. Its totient is φ = 10858288.

The previous prime is 13572833. The next prime is 13572869. The reversal of 13572865 is 56827531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56827531 = 563 ⋅100937.

It can be written as a sum of positive squares in 2 ways, for example, as 4355569 + 9217296 = 2087^2 + 3036^2 .

It is a cyclic number.

It is not a de Polignac number, because 13572865 - 2⁵ = 13572833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13572869) 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 3 ways as a sum of consecutive naturals, for example, 1357282 + ... + 1357291.

It is an arithmetic number, because the mean of its divisors is an integer number (4071861).

Almost surely, 2^13572865 is an apocalyptic number.

It is an amenable number.

13572865 is a deficient number, since it is larger than the sum of its proper divisors (2714579).

13572865 is an equidigital number, since it uses as much as digits as its factorization.

13572865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714578.

The product of its digits is 50400, while the sum is 37.

The square root of 13572865 is about 3684.1369409945. The cubic root of 13572865 is about 238.5377818716.

The spelling of 13572865 in words is "thirteen million, five hundred seventy-two thousand, eight hundred sixty-five".