681115 has 4 divisors (see below), whose sum is σ = 817344. Its totient is φ = 544888.

The previous prime is 681113. The next prime is 681127. The reversal of 681115 is 511186.

681115 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 a cyclic number.

It is not a de Polignac number, because 681115 - 2¹ = 681113 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681113) 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, 68107 + ... + 68116.

It is an arithmetic number, because the mean of its divisors is an integer number (204336).

2⁶⁸¹¹¹⁵ is an apocalyptic number.

681115 is a deficient number, since it is larger than the sum of its proper divisors (136229).

681115 is a wasteful number, since it uses less digits than its factorization.

681115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136228.

The product of its digits is 240, while the sum is 22.

The square root of 681115 is about 825.2969162671. The cubic root of 681115 is about 87.9846305803.

The spelling of 681115 in words is "six hundred eighty-one thousand, one hundred fifteen".