12522991 has 8 divisors (see below), whose sum is σ = 13626704. Its totient is φ = 11439360.

The previous prime is 12522973. The next prime is 12523073. The reversal of 12522991 is 19922521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12522991 - 2⁹ = 12522479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12522911) 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 7 ways as a sum of consecutive naturals, for example, 3705 + ... + 6226.

It is an arithmetic number, because the mean of its divisors is an integer number (1703338).

Almost surely, 2^12522991 is an apocalyptic number.

12522991 is a deficient number, since it is larger than the sum of its proper divisors (1103713).

12522991 is an equidigital number, since it uses as much as digits as its factorization.

12522991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041.

The product of its digits is 3240, while the sum is 31.

The square root of 12522991 is about 3538.7838306401. The cubic root of 12522991 is about 232.2216408933.

The spelling of 12522991 in words is "twelve million, five hundred twenty-two thousand, nine hundred ninety-one".