12515536 has 80 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 5181440.

The previous prime is 12515527. The next prime is 12515539. The reversal of 12515536 is 63551521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140580 + ... + 140668.

It is an arithmetic number, because the mean of its divisors is an integer number (361584).

Almost surely, 2^12515536 is an apocalyptic number.

12515536 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 12515536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14463360).

12515536 is an abundant number, since it is smaller than the sum of its proper divisors (16411184).

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

12515536 is a wasteful number, since it uses less digits than its factorization.

12515536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 166 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 12515536 is about 3537.7303458574. The cubic root of 12515536 is about 232.1755508397.

The spelling of 12515536 in words is "twelve million, five hundred fifteen thousand, five hundred thirty-six".