81255 has 8 divisors (see below), whose sum is σ = 130032. Its totient is φ = 43328.

The previous prime is 81239. The next prime is 81281. The reversal of 81255 is 55218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81255 - 2⁴ = 81239 is a prime.

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 81255.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2694 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (16254).

2⁸¹²⁵⁵ is an apocalyptic number.

81255 is a deficient number, since it is larger than the sum of its proper divisors (48777).

81255 is a wasteful number, since it uses less digits than its factorization.

81255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425.

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

The square root of 81255 is about 285.0526267200. The cubic root of 81255 is about 43.3128436992.

The spelling of 81255 in words is "eighty-one thousand, two hundred fifty-five".