685245 has 16 divisors (see below), whose sum is σ = 1196352. Its totient is φ = 332160.

The previous prime is 685231. The next prime is 685247. The reversal of 685245 is 542586.

It is not a de Polignac number, because 685245 - 2⁸ = 684989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685247) 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, 1912 + ... + 2241.

It is an arithmetic number, because the mean of its divisors is an integer number (74772).

2⁶⁸⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

685245 is a deficient number, since it is larger than the sum of its proper divisors (511107).

685245 is a wasteful number, since it uses less digits than its factorization.

685245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172.

The product of its digits is 9600, while the sum is 30.

The square root of 685245 is about 827.7952645431. The cubic root of 685245 is about 88.1621065002.

The spelling of 685245 in words is "six hundred eighty-five thousand, two hundred forty-five".