12172525 has 12 divisors (see below), whose sum is σ = 15149824. Its totient is φ = 9702000.

The previous prime is 12172513. The next prime is 12172549. The reversal of 12172525 is 52527121.

It is not a de Polignac number, because 12172525 - 2¹⁹ = 11648237 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12172525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7540 + ... + 9010.

Almost surely, 2^12172525 is an apocalyptic number.

It is an amenable number.

12172525 is a deficient number, since it is larger than the sum of its proper divisors (2977299).

12172525 is a wasteful number, since it uses less digits than its factorization.

12172525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812 (or 1807 counting only the distinct ones).

The product of its digits is 1400, while the sum is 25.

The square root of 12172525 is about 3488.9145876619. The cubic root of 12172525 is about 230.0348088463.

Adding to 12172525 its reverse (52527121), we get a palindrome (64699646).

The spelling of 12172525 in words is "twelve million, one hundred seventy-two thousand, five hundred twenty-five".