681044 has 24 divisors (see below), whose sum is σ = 1467648. Its totient is φ = 269280.

The previous prime is 681041. The next prime is 681047. The reversal of 681044 is 440186.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (681041) and next prime (681047).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681041) 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, 572 + ... + 1299.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

2⁶⁸¹⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

681044 is an abundant number, since it is smaller than the sum of its proper divisors (786604).

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

681044 is a wasteful number, since it uses less digits than its factorization.

681044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 681044 is about 825.2539003240. The cubic root of 681044 is about 87.9815732768.

The spelling of 681044 in words is "six hundred eighty-one thousand, forty-four".