681596 has 12 divisors (see below), whose sum is σ = 1207752. Its totient is φ = 336528.

The previous prime is 681589. The next prime is 681607. The reversal of 681596 is 695186.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 695 + ... + 1358.

It is an arithmetic number, because the mean of its divisors is an integer number (100646).

2⁶⁸¹⁵⁹⁶ is an apocalyptic number.

It is an amenable number.

681596 is a deficient number, since it is larger than the sum of its proper divisors (526156).

681596 is a wasteful number, since it uses less digits than its factorization.

681596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 2138 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 681596 is about 825.5882751105. The cubic root of 681596 is about 88.0053371419.

The spelling of 681596 in words is "six hundred eighty-one thousand, five hundred ninety-six".