12442231 has 4 divisors (see below), whose sum is σ = 12646264. Its totient is φ = 12238200.

The previous prime is 12442223. The next prime is 12442237. The reversal of 12442231 is 13224421.

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

It is a cyclic number.

It is not a de Polignac number, because 12442231 - 2³ = 12442223 is a prime.

It is a super-2 number, since 2×12442231² = 309618224514722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12442199 and 12442208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442237) 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, 101925 + ... + 102046.

It is an arithmetic number, because the mean of its divisors is an integer number (3161566).

Almost surely, 2^12442231 is an apocalyptic number.

12442231 is a deficient number, since it is larger than the sum of its proper divisors (204033).

12442231 is an equidigital number, since it uses as much as digits as its factorization.

12442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204032.

The product of its digits is 384, while the sum is 19.

The square root of 12442231 is about 3527.3546745401. The cubic root of 12442231 is about 231.7213695732.

Adding to 12442231 its reverse (13224421), we get a palindrome (25666652).

The spelling of 12442231 in words is "twelve million, four hundred forty-two thousand, two hundred thirty-one".