266291 has 2 divisors, whose sum is σ = 266292. Its totient is φ = 266290.

The previous prime is 266281. The next prime is 266293. The reversal of 266291 is 192662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266291 is a prime.

Together with 266293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266291.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266291.

It is not a weakly prime, because it can be changed into another prime (266293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133145 + 133146.

It is an arithmetic number, because the mean of its divisors is an integer number (133146).

2²⁶⁶²⁹¹ is an apocalyptic number.

266291 is a deficient number, since it is larger than the sum of its proper divisors (1).

266291 is an equidigital number, since it uses as much as digits as its factorization.

266291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 266291 is about 516.0339136142. The cubic root of 266291 is about 64.3357195878.

It can be divided in two parts, 2662 and 91, that multiplied together give a palindrome (242242).

The spelling of 266291 in words is "two hundred sixty-six thousand, two hundred ninety-one".