13765725 has 36 divisors (see below), whose sum is σ = 24861876. Its totient is φ = 7280640.

The previous prime is 13765721. The next prime is 13765727. The reversal of 13765725 is 52756731.

13765725 is a `hidden beast` number, since 13 + 76 + 572 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3767481 + 9998244 = 1941^2 + 3162^2 .

It is not a de Polignac number, because 13765725 - 2² = 13765721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13765725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13765721) 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 35 ways as a sum of consecutive naturals, for example, 43267 + ... + 43583.

Almost surely, 2^13765725 is an apocalyptic number.

13765725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13765725 is a deficient number, since it is larger than the sum of its proper divisors (11096151).

13765725 is a wasteful number, since it uses less digits than its factorization.

13765725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 518 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 13765725 is about 3710.2189962319. The cubic root of 13765725 is about 239.6622854265.

The spelling of 13765725 in words is "thirteen million, seven hundred sixty-five thousand, seven hundred twenty-five".