12522591 has 12 divisors (see below), whose sum is σ = 19152432. Its totient is φ = 7857216.

The previous prime is 12522563. The next prime is 12522593. The reversal of 12522591 is 19522521.

It is not a de Polignac number, because 12522591 - 2⁹ = 12522079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40771 + ... + 41076.

It is an arithmetic number, because the mean of its divisors is an integer number (1596036).

Almost surely, 2^12522591 is an apocalyptic number.

12522591 is a deficient number, since it is larger than the sum of its proper divisors (6629841).

12522591 is a wasteful number, since it uses less digits than its factorization.

12522591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81870 (or 81867 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 12522591 is about 3538.7273135974. The cubic root of 12522591 is about 232.2191683838.

It can be divided in two parts, 125225 and 91, that added together give a square (125316 = 354²).

The spelling of 12522591 in words is "twelve million, five hundred twenty-two thousand, five hundred ninety-one".