842039 has 6 divisors (see below), whose sum is σ = 925680. Its totient is φ = 765380.

The previous prime is 842021. The next prime is 842041. The reversal of 842039 is 930248.

It is not a de Polignac number, because 842039 - 2¹² = 837943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 841999 and 842017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3359 + ... + 3600.

It is an arithmetic number, because the mean of its divisors is an integer number (154280).

2⁸⁴²⁰³⁹ is an apocalyptic number.

842039 is a deficient number, since it is larger than the sum of its proper divisors (83641).

842039 is a wasteful number, since it uses less digits than its factorization.

842039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981 (or 6970 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 842039 is about 917.6268304709. The cubic root of 842039 is about 94.4301621873.

Subtracting 842039 from its reverse (930248), we obtain a square (88209 = 297²).

The spelling of 842039 in words is "eight hundred forty-two thousand, thirty-nine".