8442039 has 4 divisors (see below), whose sum is σ = 11256056. Its totient is φ = 5628024.

The previous prime is 8442029. The next prime is 8442043. The reversal of 8442039 is 9302448.

It is a happy number.

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

It is not a de Polignac number, because 8442039 - 2⁹ = 8441527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8441997 and 8442015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442029) 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, 1407004 + ... + 1407009.

It is an arithmetic number, because the mean of its divisors is an integer number (2814014).

Almost surely, 2^8442039 is an apocalyptic number.

8442039 is a deficient number, since it is larger than the sum of its proper divisors (2814017).

8442039 is a wasteful number, since it uses less digits than its factorization.

8442039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814016.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 8442039 is about 2905.5187144467. The cubic root of 8442039 is about 203.6178206013.

The spelling of 8442039 in words is "eight million, four hundred forty-two thousand, thirty-nine".