865842 has 8 divisors (see below), whose sum is σ = 1731696. Its totient is φ = 288612.

The previous prime is 865829. The next prime is 865847. The reversal of 865842 is 248568.

865842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

865842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (865847) by changing a digit.

865842 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, 72148 + ... + 72159.

It is an arithmetic number, because the mean of its divisors is an integer number (216462).

2⁸⁶⁵⁸⁴² is an apocalyptic number.

865842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

865842 is a wasteful number, since it uses less digits than its factorization.

865842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144312.

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

The square root of 865842 is about 930.5063137884. The cubic root of 865842 is about 95.3117000918.

The spelling of 865842 in words is "eight hundred sixty-five thousand, eight hundred forty-two".