12442439 has 8 divisors (see below), whose sum is σ = 13087872. Its totient is φ = 11812320.

The previous prime is 12442429. The next prime is 12442513. The reversal of 12442439 is 93424421.

12442439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12442439 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 (12442429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144 + ... + 5429.

It is an arithmetic number, because the mean of its divisors is an integer number (1635984).

Almost surely, 2^12442439 is an apocalyptic number.

12442439 is a deficient number, since it is larger than the sum of its proper divisors (645433).

12442439 is an equidigital number, since it uses as much as digits as its factorization.

12442439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657.

The product of its digits is 6912, while the sum is 29.

The square root of 12442439 is about 3527.3841582680. The cubic root of 12442439 is about 231.7226608148.

It can be divided in two parts, 124 and 42439, that multiplied together give a square (5262436 = 2294²).

The spelling of 12442439 in words is "twelve million, four hundred forty-two thousand, four hundred thirty-nine".