12315812 has 6 divisors (see below), whose sum is σ = 21552678. Its totient is φ = 6157904.

The previous prime is 12315811. The next prime is 12315829. The reversal of 12315812 is 21851321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11874916 + 440896 = 3446^2 + 664^2 .

It is not an unprimeable number, because it can be changed into a prime (12315811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1539473 + ... + 1539480.

It is an arithmetic number, because the mean of its divisors is an integer number (3592113).

Almost surely, 2^12315812 is an apocalyptic number.

It is an amenable number.

12315812 is a deficient number, since it is larger than the sum of its proper divisors (9236866).

12315812 is a wasteful number, since it uses less digits than its factorization.

12315812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078957 (or 3078955 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 12315812 is about 3509.3891206305. The cubic root of 12315812 is about 230.9338966169.

The spelling of 12315812 in words is "twelve million, three hundred fifteen thousand, eight hundred twelve".