255387 has 16 divisors (see below), whose sum is σ = 380160. Its totient is φ = 151200.

The previous prime is 255383. The next prime is 255413. The reversal of 255387 is 783552.

It is a happy number.

It is not a de Polignac number, because 255387 - 2² = 255383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2289 + ... + 2397.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2²⁵⁵³⁸⁷ is an apocalyptic number.

255387 is a deficient number, since it is larger than the sum of its proper divisors (124773).

255387 is a wasteful number, since it uses less digits than its factorization.

255387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194.

The product of its digits is 8400, while the sum is 30.

The square root of 255387 is about 505.3582887418. The cubic root of 255387 is about 63.4453204867.

It can be divided in two parts, 2553 and 87, that multiplied together give a triangular number (222111 = T₆₆₆).

The spelling of 255387 in words is "two hundred fifty-five thousand, three hundred eighty-seven".