681304 has 16 divisors (see below), whose sum is σ = 1375920. Its totient is φ = 314400.

The previous prime is 681293. The next prime is 681311. The reversal of 681304 is 403186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3172 + ... + 3379.

It is an arithmetic number, because the mean of its divisors is an integer number (85995).

2⁶⁸¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

681304 is an abundant number, since it is smaller than the sum of its proper divisors (694616).

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

681304 is a wasteful number, since it uses less digits than its factorization.

681304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570 (or 6566 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 681304 is about 825.4114125695. The cubic root of 681304 is about 87.9927680007.

The spelling of 681304 in words is "six hundred eighty-one thousand, three hundred four".