681560 has 32 divisors (see below), whose sum is σ = 1674000. Its totient is φ = 247680.

The previous prime is 681557. The next prime is 681563. The reversal of 681560 is 65186.

It is an interprime number because it is at equal distance from previous prime (681557) and next prime (681563).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681560.

It is not an unprimeable number, because it can be changed into a prime (681563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 1214.

2⁶⁸¹⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

681560 is an abundant number, since it is smaller than the sum of its proper divisors (992440).

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

681560 is a wasteful number, since it uses less digits than its factorization.

681560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 681560 is about 825.5664721874. The cubic root of 681560 is about 88.0037877158.

The spelling of 681560 in words is "six hundred eighty-one thousand, five hundred sixty".