13990525 has 12 divisors (see below), whose sum is σ = 17395092. Its totient is φ = 11162240.

The previous prime is 13990511. The next prime is 13990531. The reversal of 13990525 is 52509931.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10404 + 13980121 = 102^2 + 3739^2 .

It is not a de Polignac number, because 13990525 - 2⁹ = 13990013 is a prime.

It is a Duffinian number.

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, 15897 + ... + 16753.

It is an arithmetic number, because the mean of its divisors is an integer number (1449591).

Almost surely, 2^13990525 is an apocalyptic number.

It is an amenable number.

13990525 is a deficient number, since it is larger than the sum of its proper divisors (3404567).

13990525 is an equidigital number, since it uses as much as digits as its factorization.

13990525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 13990525 is about 3740.3910223398. The cubic root of 13990525 is about 240.9598424851.

The spelling of 13990525 in words is "thirteen million, nine hundred ninety thousand, five hundred twenty-five".