255451 has 4 divisors (see below), whose sum is σ = 291952. Its totient is φ = 218952.

The previous prime is 255443. The next prime is 255457. The reversal of 255451 is 154552.

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

It is a cyclic number.

It is not a de Polignac number, because 255451 - 2³ = 255443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255457) 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 in 3 ways as a sum of consecutive naturals, for example, 18240 + ... + 18253.

It is an arithmetic number, because the mean of its divisors is an integer number (72988).

2²⁵⁵⁴⁵¹ is an apocalyptic number.

255451 is a deficient number, since it is larger than the sum of its proper divisors (36501).

255451 is an equidigital number, since it uses as much as digits as its factorization.

255451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36500.

The product of its digits is 1000, while the sum is 22.

The square root of 255451 is about 505.4216061864. The cubic root of 255451 is about 63.4506198446.

It can be divided in two parts, 25 and 5451, that added together give a square (5476 = 74²).

The spelling of 255451 in words is "two hundred fifty-five thousand, four hundred fifty-one".