681004 has 12 divisors (see below), whose sum is σ = 1211728. Its totient is φ = 334800.

The previous prime is 681001. The next prime is 681011. The reversal of 681004 is 400186.

It is not an unprimeable number, because it can be changed into a prime (681001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152 + ... + 1639.

2⁶⁸¹⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

681004 is a deficient number, since it is larger than the sum of its proper divisors (530724).

681004 is a wasteful number, since it uses less digits than its factorization.

681004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 681004 is about 825.2296650024. The cubic root of 681004 is about 87.9798507587.

The spelling of 681004 in words is "six hundred eighty-one thousand, four".