12442243 has 4 divisors (see below), whose sum is σ = 13573368. Its totient is φ = 11311120.

The previous prime is 12442237. The next prime is 12442259. The reversal of 12442243 is 34224421.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12442243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12442223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565546 + ... + 565567.

It is an arithmetic number, because the mean of its divisors is an integer number (3393342).

Almost surely, 2^12442243 is an apocalyptic number.

12442243 is a deficient number, since it is larger than the sum of its proper divisors (1131125).

12442243 is a wasteful number, since it uses less digits than its factorization.

12442243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131124.

The product of its digits is 1536, while the sum is 22.

The square root of 12442243 is about 3527.3563755311. The cubic root of 12442243 is about 231.7214440683.

Adding to 12442243 its reverse (34224421), we get a palindrome (46666664).

The spelling of 12442243 in words is "twelve million, four hundred forty-two thousand, two hundred forty-three".