85281 has 16 divisors (see below), whose sum is σ = 135168. Its totient is φ = 46800.

The previous prime is 85259. The next prime is 85297. The reversal of 85281 is 18258.

It is not a de Polignac number, because 85281 - 2¹¹ = 83233 is a prime.

It is a super-2 number, since 2×85281² = 14545697922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85201) 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 15 ways as a sum of consecutive naturals, for example, 586 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (8448).

2⁸⁵²⁸¹ is an apocalyptic number.

It is an amenable number.

85281 is a deficient number, since it is larger than the sum of its proper divisors (49887).

85281 is a wasteful number, since it uses less digits than its factorization.

85281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172.

The product of its digits is 640, while the sum is 24.

The square root of 85281 is about 292.0291081382. The cubic root of 85281 is about 44.0166947667.

The spelling of 85281 in words is "eighty-five thousand, two hundred eighty-one".