681086 has 8 divisors (see below), whose sum is σ = 1167600. Its totient is φ = 291888.

The previous prime is 681067. The next prime is 681089. The reversal of 681086 is 680186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24311 + ... + 24338.

It is an arithmetic number, because the mean of its divisors is an integer number (145950).

2⁶⁸¹⁰⁸⁶ is an apocalyptic number.

681086 is a deficient number, since it is larger than the sum of its proper divisors (486514).

681086 is a wasteful number, since it uses less digits than its factorization.

681086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48658.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 681086 is about 825.2793466457. The cubic root of 681086 is about 87.9833818482.

Subtracting from 681086 its reverse (680186), we obtain a square (900 = 30²).

The spelling of 681086 in words is "six hundred eighty-one thousand, eighty-six".