255389 has 4 divisors (see below), whose sum is σ = 261660. Its totient is φ = 249120.

The previous prime is 255383. The next prime is 255413. The reversal of 255389 is 983552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60025 + 195364 = 245^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 255389 - 2⁸ = 255133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255389.

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 3 ways as a sum of consecutive naturals, for example, 3074 + ... + 3155.

It is an arithmetic number, because the mean of its divisors is an integer number (65415).

2²⁵⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

255389 is a deficient number, since it is larger than the sum of its proper divisors (6271).

255389 is an equidigital number, since it uses as much as digits as its factorization.

255389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270.

The product of its digits is 10800, while the sum is 32.

The square root of 255389 is about 505.3602675320. The cubic root of 255389 is about 63.4454861050.

The spelling of 255389 in words is "two hundred fifty-five thousand, three hundred eighty-nine".