26291 has 4 divisors (see below), whose sum is σ = 26784. Its totient is φ = 25800.

The previous prime is 26267. The next prime is 26293. The reversal of 26291 is 19262.

26291 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19262 = 2 ⋅9631.

It is a cyclic number.

It is not a de Polignac number, because 26291 - 2⁶ = 26227 is a prime.

It is a super-3 number, since 3×26291³ = 54518333280513, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26293) 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, 155 + ... + 276.

It is an arithmetic number, because the mean of its divisors is an integer number (6696).

2²⁶²⁹¹ is an apocalyptic number.

26291 is a deficient number, since it is larger than the sum of its proper divisors (493).

26291 is an equidigital number, since it uses as much as digits as its factorization.

26291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 216, while the sum is 20.

The square root of 26291 is about 162.1449968392. The cubic root of 26291 is about 29.7350747817.

It can be divided in two parts, 262 and 91, that added together give a palindrome (353).

The spelling of 26291 in words is "twenty-six thousand, two hundred ninety-one".