685265 has 12 divisors (see below), whose sum is σ = 956916. Its totient is φ = 469728.

The previous prime is 685249. The next prime is 685271. The reversal of 685265 is 562586.

It is a happy number.

685265 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 2 ways, for example, as 379456 + 305809 = 616^2 + 553^2 .

It is not a de Polignac number, because 685265 - 2⁴ = 685249 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1154 + ... + 1643.

It is an arithmetic number, because the mean of its divisors is an integer number (79743).

2⁶⁸⁵²⁶⁵ is an apocalyptic number.

It is an amenable number.

685265 is a deficient number, since it is larger than the sum of its proper divisors (271651).

685265 is a wasteful number, since it uses less digits than its factorization.

685265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2809 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 685265 is about 827.8073447367. The cubic root of 685265 is about 88.1629642104.

The spelling of 685265 in words is "six hundred eighty-five thousand, two hundred sixty-five".