13629725 has 6 divisors (see below), whose sum is σ = 16900890. Its totient is φ = 10903760.

The previous prime is 13629697. The next prime is 13629751. The reversal of 13629725 is 52792631.

It can be written as a sum of positive squares in 3 ways, for example, as 401956 + 13227769 = 634^2 + 3637^2 .

It is not a de Polignac number, because 13629725 - 2⁶ = 13629661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272570 + ... + 272619.

It is an arithmetic number, because the mean of its divisors is an integer number (2816815).

Almost surely, 2^13629725 is an apocalyptic number.

It is an amenable number.

13629725 is a deficient number, since it is larger than the sum of its proper divisors (3271165).

13629725 is an equidigital number, since it uses as much as digits as its factorization.

13629725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545199 (or 545194 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 13629725 is about 3691.8457443398. The cubic root of 13629725 is about 238.8704152131.

The spelling of 13629725 in words is "thirteen million, six hundred twenty-nine thousand, seven hundred twenty-five".