13509625 has 32 divisors (see below), whose sum is σ = 18210816. Its totient is φ = 9979200.

The previous prime is 13509619. The next prime is 13509631. The reversal of 13509625 is 52690531.

It is an interprime number because it is at equal distance from previous prime (13509619) and next prime (13509631).

It is not a de Polignac number, because 13509625 - 2⁵ = 13509593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106312 + ... + 106438.

It is an arithmetic number, because the mean of its divisors is an integer number (569088).

Almost surely, 2^13509625 is an apocalyptic number.

It is an amenable number.

13509625 is a deficient number, since it is larger than the sum of its proper divisors (4701191).

13509625 is a wasteful number, since it uses less digits than its factorization.

13509625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 13509625 is about 3675.5441773974. The cubic root of 13509625 is about 238.1667322601.

The spelling of 13509625 in words is "thirteen million, five hundred nine thousand, six hundred twenty-five".