12315856 has 60 divisors (see below), whose sum is σ = 29007072. Its totient is φ = 5041344.

The previous prime is 12315851. The next prime is 12315881. The reversal of 12315856 is 65851321.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17691 + ... + 18373.

Almost surely, 2^12315856 is an apocalyptic number.

12315856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12315856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14503536).

12315856 is an abundant number, since it is smaller than the sum of its proper divisors (16691216).

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

12315856 is a wasteful number, since it uses less digits than its factorization.

12315856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 715 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 12315856 is about 3509.3953895222. The cubic root of 12315856 is about 230.9341716313.

The spelling of 12315856 in words is "twelve million, three hundred fifteen thousand, eight hundred fifty-six".