139255 has 4 divisors (see below), whose sum is σ = 167112. Its totient is φ = 111400.

The previous prime is 139241. The next prime is 139267. The reversal of 139255 is 552931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552931 = 179 ⋅3089.

It is not a de Polignac number, because 139255 - 2¹³ = 131063 is a prime.

It is a d-powerful number, because it can be written as 1 + 3³ + 2¹¹ + 9⁵ + 5 + 5⁷ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13921 + ... + 13930.

It is an arithmetic number, because the mean of its divisors is an integer number (41778).

2¹³⁹²⁵⁵ is an apocalyptic number.

139255 is a deficient number, since it is larger than the sum of its proper divisors (27857).

139255 is an equidigital number, since it uses as much as digits as its factorization.

139255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27856.

The product of its digits is 1350, while the sum is 25.

The square root of 139255 is about 373.1688625810. The cubic root of 139255 is about 51.8326722022.

The spelling of 139255 in words is "one hundred thirty-nine thousand, two hundred fifty-five".