260681 has 8 divisors (see below), whose sum is σ = 275400. Its totient is φ = 246400.

The previous prime is 260677. The next prime is 260713. The reversal of 260681 is 186062.

It can be written as a sum of positive squares in 4 ways, for example, as 67081 + 193600 = 259^2 + 440^2 .

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 260681 - 2² = 260677 is a prime.

It is a super-2 number, since 2×260681² = 135909167522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (260651) 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 7 ways as a sum of consecutive naturals, for example, 2531 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (34425).

2²⁶⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

260681 is a deficient number, since it is larger than the sum of its proper divisors (14719).

260681 is a wasteful number, since it uses less digits than its factorization.

260681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 260681 is about 510.5692901066. The cubic root of 260681 is about 63.8807185799.

The spelling of 260681 in words is "two hundred sixty thousand, six hundred eighty-one".