12312516 has 12 divisors (see below), whose sum is σ = 28729232. Its totient is φ = 4104168.

The previous prime is 12312511. The next prime is 12312557. The reversal of 12312516 is 61521321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12312492 and 12312501.

It is not an unprimeable number, because it can be changed into a prime (12312511) 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, 513010 + ... + 513033.

Almost surely, 2^12312516 is an apocalyptic number.

It is an amenable number.

12312516 is an abundant number, since it is smaller than the sum of its proper divisors (16416716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12312516 is a wasteful number, since it uses less digits than its factorization.

12312516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026050 (or 1026048 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 12312516 is about 3508.9194918094. The cubic root of 12312516 is about 230.9132936707.

Adding to 12312516 its reverse (61521321), we get a palindrome (73833837).

The spelling of 12312516 in words is "twelve million, three hundred twelve thousand, five hundred sixteen".