842856 has 64 divisors (see below), whose sum is σ = 2505600. Its totient is φ = 231168.

The previous prime is 842819. The next prime is 842857. The reversal of 842856 is 658248.

842856 = 25² + 26² + ... + 136².

842856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842857) by changing a digit.

842856 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 15 ways as a sum of consecutive naturals, for example, 4786 + ... + 4958.

It is an arithmetic number, because the mean of its divisors is an integer number (39150).

2⁸⁴²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252800).

842856 is an abundant number, since it is smaller than the sum of its proper divisors (1662744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

842856 is a wasteful number, since it uses less digits than its factorization.

842856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 214 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 842856 is about 918.0718926097. The cubic root of 842856 is about 94.4606930393.

The spelling of 842856 in words is "eight hundred forty-two thousand, eight hundred fifty-six".