685602 has 24 divisors (see below), whose sum is σ = 1523340. Its totient is φ = 222720.

The previous prime is 685591. The next prime is 685609. The reversal of 685602 is 206586.

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 221841 = 681^2 + 471^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (685609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274 + ... + 1202.

2⁶⁸⁵⁶⁰² is an apocalyptic number.

685602 is an abundant number, since it is smaller than the sum of its proper divisors (837738).

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

685602 is a wasteful number, since it uses less digits than its factorization.

685602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 685602 is about 828.0108694939. The cubic root of 685602 is about 88.1774141190.

The spelling of 685602 in words is "six hundred eighty-five thousand, six hundred two".