12522491 has 4 divisors (see below), whose sum is σ = 12535800. Its totient is φ = 12509184.

The previous prime is 12522487. The next prime is 12522529. The reversal of 12522491 is 19422521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19422521 = 37 ⋅524933.

It is a cyclic number.

It is not a de Polignac number, because 12522491 - 2² = 12522487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12522491.

It is not an unprimeable number, because it can be changed into a prime (12522401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5126 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (3133950).

Almost surely, 2^12522491 is an apocalyptic number.

12522491 is a deficient number, since it is larger than the sum of its proper divisors (13309).

12522491 is a wasteful number, since it uses less digits than its factorization.

12522491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13308.

The product of its digits is 1440, while the sum is 26.

The square root of 12522491 is about 3538.7131841956. The cubic root of 12522491 is about 232.2185502482.

The spelling of 12522491 in words is "twelve million, five hundred twenty-two thousand, four hundred ninety-one".