681101 has 8 divisors (see below), whose sum is σ = 712704. Its totient is φ = 650160.

The previous prime is 681091. The next prime is 681113. The reversal of 681101 is 101186.

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 681101 - 2¹⁰ = 680077 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 681101.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3851 + ... + 4023.

It is an arithmetic number, because the mean of its divisors is an integer number (89088).

2⁶⁸¹¹⁰¹ is an apocalyptic number.

It is an amenable number.

681101 is a deficient number, since it is larger than the sum of its proper divisors (31603).

681101 is a wasteful number, since it uses less digits than its factorization.

681101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 681101 is about 825.2884344276. The cubic root of 681101 is about 87.9840277485.

Adding to 681101 its reverse (101186), we get a palindrome (782287).

The spelling of 681101 in words is "six hundred eighty-one thousand, one hundred one".