12516172 has 6 divisors (see below), whose sum is σ = 21903308. Its totient is φ = 6258084.

The previous prime is 12516169. The next prime is 12516211. The reversal of 12516172 is 27161521.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564518 + ... + 1564525.

Almost surely, 2^12516172 is an apocalyptic number.

It is an amenable number.

12516172 is a deficient number, since it is larger than the sum of its proper divisors (9387136).

12516172 is a wasteful number, since it uses less digits than its factorization.

12516172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129047 (or 3129045 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 12516172 is about 3537.8202328553. The cubic root of 12516172 is about 232.1794835825.

Adding to 12516172 its reverse (27161521), we get a palindrome (39677693).

The spelling of 12516172 in words is "twelve million, five hundred sixteen thousand, one hundred seventy-two".