842056 has 16 divisors (see below), whose sum is σ = 1603440. Its totient is φ = 414480.

The previous prime is 842047. The next prime is 842063. The reversal of 842056 is 650248.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 842056.

It is an unprimeable number.

842056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (100215).

2⁸⁴²⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

842056 is a deficient number, since it is larger than the sum of its proper divisors (761384).

842056 is a wasteful number, since it uses less digits than its factorization.

842056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 842056 is about 917.6360934488. The cubic root of 842056 is about 94.4307976694.

The spelling of 842056 in words is "eight hundred forty-two thousand, fifty-six".