13172525 has 12 divisors (see below), whose sum is σ = 16898100. Its totient is φ = 10174080.

The previous prime is 13172483. The next prime is 13172527. The reversal of 13172525 is 52527131.

It can be written as a sum of positive squares in 6 ways, for example, as 1359556 + 11812969 = 1166^2 + 3437^2 .

It is not a de Polignac number, because 13172525 - 2²⁰ = 12123949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13172494 and 13172503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8360 + ... + 9809.

It is an arithmetic number, because the mean of its divisors is an integer number (1408175).

Almost surely, 2^13172525 is an apocalyptic number.

It is an amenable number.

13172525 is a deficient number, since it is larger than the sum of its proper divisors (3725575).

13172525 is a wasteful number, since it uses less digits than its factorization.

13172525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18208 (or 18203 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 13172525 is about 3629.3973328915. The cubic root of 13172525 is about 236.1690651536.

Adding to 13172525 its reverse (52527131), we get a palindrome (65699656).

The spelling of 13172525 in words is "thirteen million, one hundred seventy-two thousand, five hundred twenty-five".