13656725 has 12 divisors (see below), whose sum is σ = 17826240. Its totient is φ = 10350000.

The previous prime is 13656697. The next prime is 13656739. The reversal of 13656725 is 52765631.

It is a de Polignac number, because none of the positive numbers 2^k-13656725 is a prime.

It is a super-2 number, since 2×13656725² = 373012275451250, which contains 22 as substring.

It is a zygodrome in base 11.

It is a congruent 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, 13901 + ... + 14850.

It is an arithmetic number, because the mean of its divisors is an integer number (1485520).

Almost surely, 2^13656725 is an apocalyptic number.

It is an amenable number.

13656725 is a deficient number, since it is larger than the sum of its proper divisors (4169515).

13656725 is a wasteful number, since it uses less digits than its factorization.

13656725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28780 (or 28775 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 13656725 is about 3695.5006426735. The cubic root of 13656725 is about 239.0280424371.

It can be divided in two parts, 1365672 and 5, that multiplied together give a triangular number (6828360 = T₃₆₉₅).

The spelling of 13656725 in words is "thirteen million, six hundred fifty-six thousand, seven hundred twenty-five".