685842 has 16 divisors (see below), whose sum is σ = 1382592. Its totient is φ = 226800.

The previous prime is 685819. The next prime is 685849. The reversal of 685842 is 248586.

685842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685842.

It is not an unprimeable number, because it can be changed into a prime (685849) by changing a digit.

685842 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 7 ways as a sum of consecutive naturals, for example, 528 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (86412).

2⁶⁸⁵⁸⁴² is an apocalyptic number.

685842 is an abundant number, since it is smaller than the sum of its proper divisors (696750).

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

685842 is a wasteful number, since it uses less digits than its factorization.

685842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913.

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

The square root of 685842 is about 828.1557824468. The cubic root of 685842 is about 88.1877019685.

It can be divided in two parts, 68584 and 2, that added together give a palindrome (68586).

The spelling of 685842 in words is "six hundred eighty-five thousand, eight hundred forty-two".