810255 has 16 divisors (see below), whose sum is σ = 1365120. Its totient is φ = 409248.

The previous prime is 810253. The next prime is 810259. The reversal of 810255 is 552018.

It is not a de Polignac number, because 810255 - 2¹ = 810253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810253) 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 15 ways as a sum of consecutive naturals, for example, 1137 + ... + 1706.

It is an arithmetic number, because the mean of its divisors is an integer number (85320).

2⁸¹⁰²⁵⁵ is an apocalyptic number.

810255 is a deficient number, since it is larger than the sum of its proper divisors (554865).

810255 is a wasteful number, since it uses less digits than its factorization.

810255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 810255 is about 900.1416555187. The cubic root of 810255 is about 93.2267561805.

The spelling of 810255 in words is "eight hundred ten thousand, two hundred fifty-five".