255447 has 8 divisors (see below), whose sum is σ = 378480. Its totient is φ = 170280.

The previous prime is 255443. The next prime is 255457. The reversal of 255447 is 744552.

It is not a de Polignac number, because 255447 - 2² = 255443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9461 = 255447 / (2 + 5 + 5 + 4 + 4 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 255447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255443) 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 7 ways as a sum of consecutive naturals, for example, 4704 + ... + 4757.

It is an arithmetic number, because the mean of its divisors is an integer number (47310).

2²⁵⁵⁴⁴⁷ is an apocalyptic number.

255447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

255447 is a deficient number, since it is larger than the sum of its proper divisors (123033).

255447 is an equidigital number, since it uses as much as digits as its factorization.

255447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470 (or 9464 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 255447 is about 505.4176490785. The cubic root of 255447 is about 63.4502886607.

Adding to 255447 its reverse (744552), we get a palindrome (999999).

It can be divided in two parts, 2554 and 47, that added together give a square (2601 = 51²).

The spelling of 255447 in words is "two hundred fifty-five thousand, four hundred forty-seven".