12565500 has 48 divisors (see below), whose sum is σ = 36595104. Its totient is φ = 3350400.

The previous prime is 12565493. The next prime is 12565513. The reversal of 12565500 is 556521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2689 + ... + 5688.

It is an arithmetic number, because the mean of its divisors is an integer number (762398).

Almost surely, 2^12565500 is an apocalyptic number.

12565500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12565500 is an abundant number, since it is smaller than the sum of its proper divisors (24029604).

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

12565500 is a wasteful number, since it uses less digits than its factorization.

12565500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8399 (or 8387 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 12565500 is about 3544.7849017959. The cubic root of 12565500 is about 232.4841011212.

The spelling of 12565500 in words is "twelve million, five hundred sixty-five thousand, five hundred".