12442839 has 8 divisors (see below), whose sum is σ = 17311872. Its totient is φ = 7934520.

The previous prime is 12442817. The next prime is 12442847. The reversal of 12442839 is 93824421.

12442839 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 not a de Polignac number, because 12442839 - 2⁹ = 12442327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442139) 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 7 ways as a sum of consecutive naturals, for example, 90097 + ... + 90234.

It is an arithmetic number, because the mean of its divisors is an integer number (2163984).

Almost surely, 2^12442839 is an apocalyptic number.

12442839 is a deficient number, since it is larger than the sum of its proper divisors (4869033).

12442839 is a wasteful number, since it uses less digits than its factorization.

12442839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180357.

The product of its digits is 13824, while the sum is 33.

The square root of 12442839 is about 3527.4408570520. The cubic root of 12442839 is about 231.7251439311.

The spelling of 12442839 in words is "twelve million, four hundred forty-two thousand, eight hundred thirty-nine".