13189725 has 54 divisors (see below), whose sum is σ = 24811098. Its totient is φ = 6696000.

The previous prime is 13189721. The next prime is 13189747. The reversal of 13189725 is 52798131.

It can be written as a sum of positive squares in 3 ways, for example, as 34596 + 13155129 = 186^2 + 3627^2 .

It is not a de Polignac number, because 13189725 - 2² = 13189721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13189725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13189721) by changing a digit.

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 53 ways as a sum of consecutive naturals, for example, 216195 + ... + 216255.

Almost surely, 2^13189725 is an apocalyptic number.

13189725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13189725 is a deficient number, since it is larger than the sum of its proper divisors (11621373).

13189725 is a wasteful number, since it uses less digits than its factorization.

13189725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 100 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13189725 is about 3631.7660992966. The cubic root of 13189725 is about 236.2718128848.

The spelling of 13189725 in words is "thirteen million, one hundred eighty-nine thousand, seven hundred twenty-five".