681072 has 40 divisors (see below), whose sum is σ = 2011776. Its totient is φ = 194496.

The previous prime is 681067. The next prime is 681089. The reversal of 681072 is 270186.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678 + ... + 1349.

2⁶⁸¹⁰⁷² is an apocalyptic number.

It is an amenable number.

681072 is an abundant number, since it is smaller than the sum of its proper divisors (1330704).

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

681072 is a wasteful number, since it uses less digits than its factorization.

681072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 681072 is about 825.2708646257. The cubic root of 681072 is about 87.9827789993.

The spelling of 681072 in words is "six hundred eighty-one thousand, seventy-two".