13615625 has 12 divisors (see below), whose sum is σ = 17022348. Its totient is φ = 10890000.

The previous prime is 13615597. The next prime is 13615633. The reversal of 13615625 is 52651631.

It can be written as a sum of positive squares in 6 ways, for example, as 6497401 + 7118224 = 2549^2 + 2668^2 .

It is not a de Polignac number, because 13615625 - 2⁸ = 13615369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 947 + ... + 5303.

It is an arithmetic number, because the mean of its divisors is an integer number (1418529).

Almost surely, 2^13615625 is an apocalyptic number.

It is an amenable number.

13615625 is a deficient number, since it is larger than the sum of its proper divisors (3406723).

13615625 is an frugal number, since it uses more digits than its factorization.

13615625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4382 (or 4362 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 13615625 is about 3689.9356362950. The cubic root of 13615625 is about 238.7880160218.

The spelling of 13615625 in words is "thirteen million, six hundred fifteen thousand, six hundred twenty-five".