13688425 has 6 divisors (see below), whose sum is σ = 16973678. Its totient is φ = 10950720.

The previous prime is 13688419. The next prime is 13688431. The reversal of 13688425 is 52488631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13688419) and next prime (13688431).

It can be written as a sum of positive squares in 3 ways, for example, as 50176 + 13638249 = 224^2 + 3693^2 .

It is not a de Polignac number, because 13688425 - 2⁵ = 13688393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273744 + ... + 273793.

Almost surely, 2^13688425 is an apocalyptic number.

It is an amenable number.

13688425 is a deficient number, since it is larger than the sum of its proper divisors (3285253).

13688425 is an equidigital number, since it uses as much as digits as its factorization.

13688425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547547 (or 547542 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 13688425 is about 3699.7871560402. The cubic root of 13688425 is about 239.2128435459.

The spelling of 13688425 in words is "thirteen million, six hundred eighty-eight thousand, four hundred twenty-five".