255385 has 8 divisors (see below), whose sum is σ = 330120. Its totient is φ = 188544.

The previous prime is 255383. The next prime is 255413. The reversal of 255385 is 583552.

It can be written as a sum of positive squares in 4 ways, for example, as 1369 + 254016 = 37^2 + 504^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 255385 - 2¹ = 255383 is a prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900 + ... + 2029.

It is an arithmetic number, because the mean of its divisors is an integer number (41265).

2²⁵⁵³⁸⁵ is an apocalyptic number.

It is an amenable number.

255385 is a deficient number, since it is larger than the sum of its proper divisors (74735).

255385 is a wasteful number, since it uses less digits than its factorization.

255385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947.

The product of its digits is 6000, while the sum is 28.

The square root of 255385 is about 505.3563099438. The cubic root of 255385 is about 63.4451548675.

The spelling of 255385 in words is "two hundred fifty-five thousand, three hundred eighty-five".