13129825 has 6 divisors (see below), whose sum is σ = 16281014. Its totient is φ = 10503840.

The previous prime is 13129807. The next prime is 13129841. The reversal of 13129825 is 52892131.

13129825 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1515361 + 11614464 = 1231^2 + 3408^2 .

It is not a de Polignac number, because 13129825 - 2⁵ = 13129793 is a prime.

It is a Duffinian 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, 262572 + ... + 262621.

Almost surely, 2^13129825 is an apocalyptic number.

It is an amenable number.

13129825 is a deficient number, since it is larger than the sum of its proper divisors (3151189).

13129825 is an equidigital number, since it uses as much as digits as its factorization.

13129825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525203 (or 525198 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 13129825 is about 3623.5100386228. The cubic root of 13129825 is about 235.9136007106.

The spelling of 13129825 in words is "thirteen million, one hundred twenty-nine thousand, eight hundred twenty-five".