13213925 has 12 divisors (see below), whose sum is σ = 16432356. Its totient is φ = 10540800.

The previous prime is 13213901. The next prime is 13213933. The reversal of 13213925 is 52931231.

It can be written as a sum of positive squares in 6 ways, for example, as 66049 + 13147876 = 257^2 + 3626^2 .

It is not a de Polignac number, because 13213925 - 2¹² = 13209829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13213894 and 13213903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13037 + ... + 14013.

It is an arithmetic number, because the mean of its divisors is an integer number (1369363).

Almost surely, 2^13213925 is an apocalyptic number.

It is an amenable number.

13213925 is a deficient number, since it is larger than the sum of its proper divisors (3218431).

13213925 is an equidigital number, since it uses as much as digits as its factorization.

13213925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1523 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 13213925 is about 3635.0962848321. The cubic root of 13213925 is about 236.4162254107.

The spelling of 13213925 in words is "thirteen million, two hundred thirteen thousand, nine hundred twenty-five".