672681 has 8 divisors (see below), whose sum is σ = 936000. Its totient is φ = 428912.

The previous prime is 672667. The next prime is 672703. The reversal of 672681 is 186276.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 672681 - 2⁹ = 672169 is a prime.

It is a super-2 number, since 2×672681² = 904999455522, which contains 22 as substring.

672681 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 672681.

It is not an unprimeable number, because it can be changed into a prime (672641) 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, 4806 + ... + 4943.

It is an arithmetic number, because the mean of its divisors is an integer number (117000).

2⁶⁷²⁶⁸¹ is an apocalyptic number.

It is an amenable number.

672681 is a deficient number, since it is larger than the sum of its proper divisors (263319).

672681 is a wasteful number, since it uses less digits than its factorization.

672681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9775.

The product of its digits is 4032, while the sum is 30.

The square root of 672681 is about 820.1713235660. The cubic root of 672681 is about 87.6199606314.

The spelling of 672681 in words is "six hundred seventy-two thousand, six hundred eighty-one".