26139 has 4 divisors (see below), whose sum is σ = 34856. Its totient is φ = 17424.

The previous prime is 26119. The next prime is 26141. The reversal of 26139 is 93162.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26139 - 2⁵ = 26107 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (26119) 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, 4354 + ... + 4359.

It is an arithmetic number, because the mean of its divisors is an integer number (8714).

2²⁶¹³⁹ is an apocalyptic number.

26139 is a deficient number, since it is larger than the sum of its proper divisors (8717).

26139 is an equidigital number, since it uses as much as digits as its factorization.

26139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8716.

The product of its digits is 324, while the sum is 21.

The square root of 26139 is about 161.6756011277. The cubic root of 26139 is about 29.6776600815.

It can be divided in two parts, 261 and 39, that added together give a triangular number (300 = T₂₄).

The spelling of 26139 in words is "twenty-six thousand, one hundred thirty-nine".