260891 has 4 divisors (see below), whose sum is σ = 262032. Its totient is φ = 259752.

The previous prime is 260879. The next prime is 260893. The reversal of 260891 is 198062.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 260891 - 2¹⁰ = 259867 is a prime.

It is a super-2 number, since 2×260891² = 136128227762, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 260891.

It is not an unprimeable number, because it can be changed into a prime (260893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 728.

It is an arithmetic number, because the mean of its divisors is an integer number (65508).

2²⁶⁰⁸⁹¹ is an apocalyptic number.

260891 is a deficient number, since it is larger than the sum of its proper divisors (1141).

260891 is an equidigital number, since it uses as much as digits as its factorization.

260891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 260891 is about 510.7749014977. The cubic root of 260891 is about 63.8978677012.

The spelling of 260891 in words is "two hundred sixty thousand, eight hundred ninety-one".