12315687 has 4 divisors (see below), whose sum is σ = 16420920. Its totient is φ = 8210456.

The previous prime is 12315679. The next prime is 12315707. The reversal of 12315687 is 78651321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12315687 - 2³ = 12315679 is a prime.

It is a super-2 number, since 2×12315687² = 303352292563938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315617) 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, 2052612 + ... + 2052617.

It is an arithmetic number, because the mean of its divisors is an integer number (4105230).

Almost surely, 2^12315687 is an apocalyptic number.

12315687 is a deficient number, since it is larger than the sum of its proper divisors (4105233).

12315687 is an equidigital number, since it uses as much as digits as its factorization.

12315687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4105232.

The product of its digits is 10080, while the sum is 33.

The square root of 12315687 is about 3509.3713112180. The cubic root of 12315687 is about 230.9331153222.

The spelling of 12315687 in words is "twelve million, three hundred fifteen thousand, six hundred eighty-seven".