685085 has 8 divisors (see below), whose sum is σ = 827736. Its totient is φ = 544320.

The previous prime is 685081. The next prime is 685093. The reversal of 685085 is 580586.

685085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1156 + 683929 = 34^2 + 827^2 .

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

It is not a de Polignac number, because 685085 - 2² = 685081 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685081) 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, 527 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (103467).

2⁶⁸⁵⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

685085 is a deficient number, since it is larger than the sum of its proper divisors (142651).

685085 is a wasteful number, since it uses less digits than its factorization.

685085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 685085 is about 827.6986166474. The cubic root of 685085 is about 88.1552442173.

The spelling of 685085 in words is "six hundred eighty-five thousand, eighty-five".