12515868 has 36 divisors (see below), whose sum is σ = 32115720. Its totient is φ = 4108896.

The previous prime is 12515863. The next prime is 12515869. The reversal of 12515868 is 86851521.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515863) 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, 183 + ... + 5006.

Almost surely, 2^12515868 is an apocalyptic number.

12515868 is a gapful number since it is divisible by the number (18) 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 12515868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16057860).

12515868 is an abundant number, since it is smaller than the sum of its proper divisors (19599852).

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

12515868 is a wasteful number, since it uses less digits than its factorization.

12515868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266 (or 5261 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 12515868 is about 3537.7772682858. Note that the first 3 decimals coincide. The cubic root of 12515868 is about 232.1776037975.

The spelling of 12515868 in words is "twelve million, five hundred fifteen thousand, eight hundred sixty-eight".