26591 has 2 divisors, whose sum is σ = 26592. Its totient is φ = 26590.

The previous prime is 26573. The next prime is 26597. The reversal of 26591 is 19562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26591 is a prime.

It is a plaindrome in base 12 and base 16.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13295 + 13296.

It is an arithmetic number, because the mean of its divisors is an integer number (13296).

2²⁶⁵⁹¹ is an apocalyptic number.

26591 is a deficient number, since it is larger than the sum of its proper divisors (1).

26591 is an equidigital number, since it uses as much as digits as its factorization.

26591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 26591 is about 163.0674706985. The cubic root of 26591 is about 29.8477471278.

The spelling of 26591 in words is "twenty-six thousand, five hundred ninety-one".