255859 has 2 divisors, whose sum is σ = 255860. Its totient is φ = 255858.

The previous prime is 255851. The next prime is 255869. The reversal of 255859 is 958552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255859 - 2³ = 255851 is a prime.

It is not a weakly prime, because it can be changed into another prime (255851) by changing a digit.

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 as a sum of consecutive naturals, namely, 127929 + 127930.

It is an arithmetic number, because the mean of its divisors is an integer number (127930).

2²⁵⁵⁸⁵⁹ is an apocalyptic number.

255859 is a deficient number, since it is larger than the sum of its proper divisors (1).

255859 is an equidigital number, since it uses as much as digits as its factorization.

255859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 34.

The square root of 255859 is about 505.8250685761. The cubic root of 255859 is about 63.4843824614.

The spelling of 255859 in words is "two hundred fifty-five thousand, eight hundred fifty-nine".