12315907 has 4 divisors (see below), whose sum is σ = 12323520. Its totient is φ = 12308296.

The previous prime is 12315883. The next prime is 12315929. The reversal of 12315907 is 70951321.

12315907 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70951321 = 7 ⋅10135903.

It is a cyclic number.

It is not a de Polignac number, because 12315907 - 2²³ = 3927299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12315967) 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, 307 + ... + 4972.

It is an arithmetic number, because the mean of its divisors is an integer number (3080880).

Almost surely, 2^12315907 is an apocalyptic number.

12315907 is a deficient number, since it is larger than the sum of its proper divisors (7613).

12315907 is an equidigital number, since it uses as much as digits as its factorization.

12315907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 12315907 is about 3509.4026557236. The cubic root of 12315907 is about 230.9344903973.

The spelling of 12315907 in words is "twelve million, three hundred fifteen thousand, nine hundred seven".