681006 has 8 divisors (see below), whose sum is σ = 1362024. Its totient is φ = 227000.

The previous prime is 681001. The next prime is 681011. The reversal of 681006 is 600186.

It is an interprime number because it is at equal distance from previous prime (681001) and next prime (681011).

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

681006 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681006.

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

681006 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, 56745 + ... + 56756.

It is an arithmetic number, because the mean of its divisors is an integer number (170253).

2⁶⁸¹⁰⁰⁶ is an apocalyptic number.

681006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

681006 is a wasteful number, since it uses less digits than its factorization.

681006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113506.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 681006 is about 825.2308767854. The cubic root of 681006 is about 87.9799368862.

The spelling of 681006 in words is "six hundred eighty-one thousand, six".