685004 has 6 divisors (see below), whose sum is σ = 1198764. Its totient is φ = 342500.

The previous prime is 685001. The next prime is 685019. The reversal of 685004 is 400586.

It is not an unprimeable number, because it can be changed into a prime (685001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85622 + ... + 85629.

It is an arithmetic number, because the mean of its divisors is an integer number (199794).

2⁶⁸⁵⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

685004 is a deficient number, since it is larger than the sum of its proper divisors (513760).

685004 is a wasteful number, since it uses less digits than its factorization.

685004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171255 (or 171253 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 685004 is about 827.6496843472. The cubic root of 685004 is about 88.1517697792.

The spelling of 685004 in words is "six hundred eighty-five thousand, four".