12422321 has 4 divisors (see below), whose sum is σ = 12465012. Its totient is φ = 12379632.

The previous prime is 12422309. The next prime is 12422329. The reversal of 12422321 is 12322421.

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 9985600 + 2436721 = 3160^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 12422321 - 2¹⁸ = 12160177 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 12422321.

It is not an unprimeable number, because it can be changed into a prime (12422329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20906 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (3116253).

Almost surely, 2^12422321 is an apocalyptic number.

It is an amenable number.

12422321 is a deficient number, since it is larger than the sum of its proper divisors (42691).

12422321 is an equidigital number, since it uses as much as digits as its factorization.

12422321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42690.

The product of its digits is 192, while the sum is 17.

The square root of 12422321 is about 3524.5313163597. The cubic root of 12422321 is about 231.5977037684.

Adding to 12422321 its reverse (12322421), we get a palindrome (24744742).

The spelling of 12422321 in words is "twelve million, four hundred twenty-two thousand, three hundred twenty-one".