255040 has 28 divisors (see below), whose sum is σ = 608076. Its totient is φ = 101888.

The previous prime is 255023. The next prime is 255043. The reversal of 255040 is 40552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 147456 = 328^2 + 384^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (21717).

2²⁵⁵⁰⁴⁰ is an apocalyptic number.

255040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255040 is an abundant number, since it is smaller than the sum of its proper divisors (353036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255040 is an equidigital number, since it uses as much as digits as its factorization.

255040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 255040 is about 505.0148512668. The cubic root of 255040 is about 63.4165726064.

Adding to 255040 its reverse (40552), we get a palindrome (295592).

The spelling of 255040 in words is "two hundred fifty-five thousand, forty".