686085 has 16 divisors (see below), whose sum is σ = 1119744. Its totient is φ = 358592.

The previous prime is 686057. The next prime is 686087. The reversal of 686085 is 580686.

It is a cyclic number.

It is not a de Polignac number, because 686085 - 2¹¹ = 684037 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (69984).

2⁶⁸⁶⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

686085 is a deficient number, since it is larger than the sum of its proper divisors (433659).

686085 is a wasteful number, since it uses less digits than its factorization.

686085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 686085 is about 828.3024809814. The cubic root of 686085 is about 88.1981159711.

The spelling of 686085 in words is "six hundred eighty-six thousand, eighty-five".