12521585 has 4 divisors (see below), whose sum is σ = 15025908. Its totient is φ = 10017264.

The previous prime is 12521581. The next prime is 12521603. The reversal of 12521585 is 58512521.

12521585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58512521 = 17 ⋅3441913.

It can be written as a sum of positive squares in 2 ways, for example, as 7890481 + 4631104 = 2809^2 + 2152^2 .

It is a cyclic number.

It is not a de Polignac number, because 12521585 - 2² = 12521581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12521581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252154 + ... + 1252163.

It is an arithmetic number, because the mean of its divisors is an integer number (3756477).

Almost surely, 2^12521585 is an apocalyptic number.

It is an amenable number.

12521585 is a deficient number, since it is larger than the sum of its proper divisors (2504323).

12521585 is an equidigital number, since it uses as much as digits as its factorization.

12521585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504322.

The product of its digits is 4000, while the sum is 29.

The square root of 12521585 is about 3538.5851692449. The cubic root of 12521585 is about 232.2129497895.

The spelling of 12521585 in words is "twelve million, five hundred twenty-one thousand, five hundred eighty-five".