12517216 has 12 divisors (see below), whose sum is σ = 24643332. Its totient is φ = 6258592.

The previous prime is 12517199. The next prime is 12517217. The reversal of 12517216 is 61271521.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (12517217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195550 + ... + 195613.

It is an arithmetic number, because the mean of its divisors is an integer number (2053611).

Almost surely, 2^12517216 is an apocalyptic number.

12517216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12517216 is a deficient number, since it is larger than the sum of its proper divisors (12126116).

12517216 is an equidigital number, since it uses as much as digits as its factorization.

12517216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391173 (or 391165 counting only the distinct ones).

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

The square root of 12517216 is about 3537.9677782592. The cubic root of 12517216 is about 232.1859389279.

Adding to 12517216 its reverse (61271521), we get a palindrome (73788737).

The spelling of 12517216 in words is "twelve million, five hundred seventeen thousand, two hundred sixteen".