681159 has 4 divisors (see below), whose sum is σ = 908216. Its totient is φ = 454104.

The previous prime is 681151. The next prime is 681167. The reversal of 681159 is 951186.

It is a happy number.

681159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (681151) and next prime (681167).

It is not a de Polignac number, because 681159 - 2³ = 681151 is a prime.

It is a D-number.

It is a Duffinian number.

681159 is a lucky 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 681159.

It is not an unprimeable number, because it can be changed into a prime (681151) 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, 113524 + ... + 113529.

It is an arithmetic number, because the mean of its divisors is an integer number (227054).

2⁶⁸¹¹⁵⁹ is an apocalyptic number.

681159 is a deficient number, since it is larger than the sum of its proper divisors (227057).

681159 is a wasteful number, since it uses less digits than its factorization.

681159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227056.

The product of its digits is 2160, while the sum is 30.

The square root of 681159 is about 825.3235729094. The cubic root of 681159 is about 87.9865251406.

The spelling of 681159 in words is "six hundred eighty-one thousand, one hundred fifty-nine".