12322581 has 4 divisors (see below), whose sum is σ = 16430112. Its totient is φ = 8215052.

The previous prime is 12322579. The next prime is 12322613. The reversal of 12322581 is 18522321.

12322581 is digitally balanced in base 3, 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12322581 - 2¹ = 12322579 is a prime.

It is a super-2 number, since 2×12322581² = 303692005003122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12322081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053761 + ... + 2053766.

It is an arithmetic number, because the mean of its divisors is an integer number (4107528).

Almost surely, 2^12322581 is an apocalyptic number.

It is an amenable number.

12322581 is a deficient number, since it is larger than the sum of its proper divisors (4107531).

12322581 is an equidigital number, since it uses as much as digits as its factorization.

12322581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107530.

The product of its digits is 960, while the sum is 24.

The square root of 12322581 is about 3510.3534010125. The cubic root of 12322581 is about 230.9761973938.

The spelling of 12322581 in words is "twelve million, three hundred twenty-two thousand, five hundred eighty-one".