12442217 has 2 divisors, whose sum is σ = 12442218. Its totient is φ = 12442216.

The previous prime is 12442201. The next prime is 12442219. The reversal of 12442217 is 71224421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11316496 + 1125721 = 3364^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 12442217 - 2⁴ = 12442201 is a prime.

Together with 12442219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12442192 and 12442201.

It is not a weakly prime, because it can be changed into another prime (12442219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221108 + 6221109.

It is an arithmetic number, because the mean of its divisors is an integer number (6221109).

Almost surely, 2^12442217 is an apocalyptic number.

It is an amenable number.

12442217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12442217 is an equidigital number, since it uses as much as digits as its factorization.

12442217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 23.

The square root of 12442217 is about 3527.3526900496. The cubic root of 12442217 is about 231.7212826622.

Adding to 12442217 its reverse (71224421), we get a palindrome (83666638).

The spelling of 12442217 in words is "twelve million, four hundred forty-two thousand, two hundred seventeen".