13620925 has 6 divisors (see below), whose sum is σ = 16889978. Its totient is φ = 10896720.

The previous prime is 13620889. The next prime is 13620931. The reversal of 13620925 is 52902631.

13620925 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 210681 + 13410244 = 459^2 + 3662^2 .

It is not a de Polignac number, because 13620925 - 2⁷ = 13620797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13620893 and 13620902.

It is a congruent number.

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, 272394 + ... + 272443.

Almost surely, 2^13620925 is an apocalyptic number.

It is an amenable number.

13620925 is a deficient number, since it is larger than the sum of its proper divisors (3269053).

13620925 is an equidigital number, since it uses as much as digits as its factorization.

13620925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544847 (or 544842 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 13620925 is about 3690.6537361286. The cubic root of 13620925 is about 238.8189954372.

The spelling of 13620925 in words is "thirteen million, six hundred twenty thousand, nine hundred twenty-five".