12505172 has 6 divisors (see below), whose sum is σ = 21884058. Its totient is φ = 6252584.

The previous prime is 12505151. The next prime is 12505189. The reversal of 12505172 is 27150521.

It is a happy number.

12505172 is digitally balanced in base 2, 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 only one way, i.e., 10471696 + 2033476 = 3236^2 + 1426^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1563143 + ... + 1563150.

It is an arithmetic number, because the mean of its divisors is an integer number (3647343).

Almost surely, 2^12505172 is an apocalyptic number.

It is an amenable number.

12505172 is a deficient number, since it is larger than the sum of its proper divisors (9378886).

12505172 is a wasteful number, since it uses less digits than its factorization.

12505172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126297 (or 3126295 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 12505172 is about 3536.2652615436. The cubic root of 12505172 is about 232.1114456637. Note that the first 3 decimals are identical.

Adding to 12505172 its reverse (27150521), we get a palindrome (39655693).

The spelling of 12505172 in words is "twelve million, five hundred five thousand, one hundred seventy-two".