681852 has 12 divisors (see below), whose sum is σ = 1591016. Its totient is φ = 227280.

The previous prime is 681841. The next prime is 681883. The reversal of 681852 is 258186.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

681852 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28399 + ... + 28422.

2⁶⁸¹⁸⁵² is an apocalyptic number.

It is an amenable number.

681852 is an abundant number, since it is smaller than the sum of its proper divisors (909164).

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

681852 is a wasteful number, since it uses less digits than its factorization.

681852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56828 (or 56826 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 681852 is about 825.7433015169. The cubic root of 681852 is about 88.0163537100.

The spelling of 681852 in words is "six hundred eighty-one thousand, eight hundred fifty-two".