12442247 has 4 divisors (see below), whose sum is σ = 12871320. Its totient is φ = 12013176.

The previous prime is 12442237. The next prime is 12442259. The reversal of 12442247 is 74224421.

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 12442247 - 2⁸ = 12441991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442217) 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, 214493 + ... + 214550.

It is an arithmetic number, because the mean of its divisors is an integer number (3217830).

Almost surely, 2^12442247 is an apocalyptic number.

12442247 is a deficient number, since it is larger than the sum of its proper divisors (429073).

12442247 is an equidigital number, since it uses as much as digits as its factorization.

12442247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429072.

The product of its digits is 3584, while the sum is 26.

The square root of 12442247 is about 3527.3569425279. The cubic root of 12442247 is about 231.7214689000.

Adding to 12442247 its reverse (74224421), we get a palindrome (86666668).

The spelling of 12442247 in words is "twelve million, four hundred forty-two thousand, two hundred forty-seven".