26091 has 12 divisors (see below), whose sum is σ = 40768. Its totient is φ = 15984.

The previous prime is 26083. The next prime is 26099. The reversal of 26091 is 19062.

It is an interprime number because it is at equal distance from previous prime (26083) and next prime (26099).

It is not a de Polignac number, because 26091 - 2³ = 26083 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (26099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6 + ... + 228.

2²⁶⁰⁹¹ is an apocalyptic number.

26091 is a deficient number, since it is larger than the sum of its proper divisors (14677).

26091 is a wasteful number, since it uses less digits than its factorization.

26091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 26091 is about 161.5270875117. The cubic root of 26091 is about 29.6594828936.

It can be divided in two parts, 260 and 91, that added together give a triangular number (351 = T₂₆).

The spelling of 26091 in words is "twenty-six thousand, ninety-one".