12315906 has 12 divisors (see below), whose sum is σ = 26684502. Its totient is φ = 4105296.

The previous prime is 12315883. The next prime is 12315929. The reversal of 12315906 is 60951321.

It is an interprime number because it is at equal distance from previous prime (12315883) and next prime (12315929).

It can be written as a sum of positive squares in only one way, i.e., 7868025 + 4447881 = 2805^2 + 2109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12315906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342091 + ... + 342126.

Almost surely, 2^12315906 is an apocalyptic number.

12315906 is an abundant number, since it is smaller than the sum of its proper divisors (14368596).

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

12315906 is a wasteful number, since it uses less digits than its factorization.

12315906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684225 (or 684222 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12315906 is about 3509.4025132492. The cubic root of 12315906 is about 230.9344841470.

The spelling of 12315906 in words is "twelve million, three hundred fifteen thousand, nine hundred six".