12690172 has 12 divisors (see below), whose sum is σ = 24226776. Its totient is φ = 5768240.

The previous prime is 12690151. The next prime is 12690179. The reversal of 12690172 is 27109621.

It is a happy number.

12690172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12690172² = 322080930779168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12690172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144163 + ... + 144250.

It is an arithmetic number, because the mean of its divisors is an integer number (2018898).

Almost surely, 2^12690172 is an apocalyptic number.

It is an amenable number.

12690172 is a deficient number, since it is larger than the sum of its proper divisors (11536604).

12690172 is a wasteful number, since it uses less digits than its factorization.

12690172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288428 (or 288426 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 12690172 is about 3562.3267677180. The cubic root of 12690172 is about 233.2504567347.

Adding to 12690172 its reverse (27109621), we get a palindrome (39799793).

The spelling of 12690172 in words is "twelve million, six hundred ninety thousand, one hundred seventy-two".