856042 has 16 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 385120.

The previous prime is 856021. The next prime is 856043. The reversal of 856042 is 240658.

It is a junction number, because it is equal to n+sod(n) for n = 855998 and 856016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856043) 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, 3558 + ... + 3790.

It is an arithmetic number, because the mean of its divisors is an integer number (88452).

2⁸⁵⁶⁰⁴² is an apocalyptic number.

856042 is a deficient number, since it is larger than the sum of its proper divisors (559190).

856042 is a wasteful number, since it uses less digits than its factorization.

856042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413.

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

The square root of 856042 is about 925.2253779485. The cubic root of 856042 is about 94.9507408524.

The spelling of 856042 in words is "eight hundred fifty-six thousand, forty-two".