13631425 has 6 divisors (see below), whose sum is σ = 16902998. Its totient is φ = 10905120.

The previous prime is 13631411. The next prime is 13631459. The reversal of 13631425 is 52413631.

It can be written as a sum of positive squares in 3 ways, for example, as 374544 + 13256881 = 612^2 + 3641^2 .

It is not a de Polignac number, because 13631425 - 2⁹ = 13630913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 545257 = 13631425 / (1 + 3 + 6 + 3 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13631425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272604 + ... + 272653.

Almost surely, 2^13631425 is an apocalyptic number.

It is an amenable number.

13631425 is a deficient number, since it is larger than the sum of its proper divisors (3271573).

13631425 is an equidigital number, since it uses as much as digits as its factorization.

13631425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545267 (or 545262 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 13631425 is about 3692.0759742996. The cubic root of 13631425 is about 238.8803460279.

The spelling of 13631425 in words is "thirteen million, six hundred thirty-one thousand, four hundred twenty-five".