12565536 has 72 divisors (see below), whose sum is σ = 35143920. Its totient is φ = 3920256.

The previous prime is 12565519. The next prime is 12565537. The reversal of 12565536 is 63556521.

It is a junction number, because it is equal to n+sod(n) for n = 12565497 and 12565506.

It is not an unprimeable number, because it can be changed into a prime (12565537) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 151351 + ... + 151433.

It is an arithmetic number, because the mean of its divisors is an integer number (488110).

Almost surely, 2^12565536 is an apocalyptic number.

12565536 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 12565536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17571960).

12565536 is an abundant number, since it is smaller than the sum of its proper divisors (22578384).

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

12565536 is an equidigital number, since it uses as much as digits as its factorization.

12565536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 107 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 12565536 is about 3544.7899796744. The cubic root of 12565536 is about 232.4843231423.

The spelling of 12565536 in words is "twelve million, five hundred sixty-five thousand, five hundred thirty-six".