255871 has 8 divisors (see below), whose sum is σ = 319104. Its totient is φ = 199320.

The previous prime is 255869. The next prime is 255877. The reversal of 255871 is 178552.

255871 = 204² + 205² + ... + 209².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255871 - 2¹ = 255869 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585 + ... + 1738.

It is an arithmetic number, because the mean of its divisors is an integer number (39888).

2²⁵⁵⁸⁷¹ is an apocalyptic number.

255871 is a deficient number, since it is larger than the sum of its proper divisors (63233).

255871 is a wasteful number, since it uses less digits than its factorization.

255871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341.

The product of its digits is 2800, while the sum is 28.

The square root of 255871 is about 505.8369302453. The cubic root of 255871 is about 63.4853749360.

The spelling of 255871 in words is "two hundred fifty-five thousand, eight hundred seventy-one".