12523565 has 16 divisors (see below), whose sum is σ = 15913920. Its totient is φ = 9434880.

The previous prime is 12523561. The next prime is 12523579. The reversal of 12523565 is 56532521.

It is a happy number.

It is not a de Polignac number, because 12523565 - 2² = 12523561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523561) 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 15 ways as a sum of consecutive naturals, for example, 22622 + ... + 23168.

It is an arithmetic number, because the mean of its divisors is an integer number (994620).

Almost surely, 2^12523565 is an apocalyptic number.

It is an amenable number.

12523565 is a deficient number, since it is larger than the sum of its proper divisors (3390355).

12523565 is a wasteful number, since it uses less digits than its factorization.

12523565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its digits is 9000, while the sum is 29.

The square root of 12523565 is about 3538.8649310195. The cubic root of 12523565 is about 232.2251888526.

The spelling of 12523565 in words is "twelve million, five hundred twenty-three thousand, five hundred sixty-five".