12622321 has 4 divisors (see below), whose sum is σ = 12860532. Its totient is φ = 12384112.

The previous prime is 12622297. The next prime is 12622333. The reversal of 12622321 is 12322621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 4669921 = 2820^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 12622321 - 2¹⁵ = 12589553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12622021) 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, 119026 + ... + 119131.

It is an arithmetic number, because the mean of its divisors is an integer number (3215133).

Almost surely, 2^12622321 is an apocalyptic number.

It is an amenable number.

12622321 is a deficient number, since it is larger than the sum of its proper divisors (238211).

12622321 is an equidigital number, since it uses as much as digits as its factorization.

12622321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238210.

The product of its digits is 288, while the sum is 19.

The square root of 12622321 is about 3552.7905933224. The cubic root of 12622321 is about 232.8340040885.

Adding to 12622321 its reverse (12322621), we get a palindrome (24944942).

The spelling of 12622321 in words is "twelve million, six hundred twenty-two thousand, three hundred twenty-one".