86281 has 4 divisors (see below), whose sum is σ = 92932. Its totient is φ = 79632.

The previous prime is 86269. The next prime is 86287. The reversal of 86281 is 18268.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5625 + 80656 = 75^2 + 284^2 .

It is a cyclic number.

It is not a de Polignac number, because 86281 - 2⁵ = 86249 is a prime.

It is a super-2 number, since 2×86281² = 14888821922, which contains 22 as substring.

It is a Duffinian number.

86281 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3306 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (23233).

2⁸⁶²⁸¹ is an apocalyptic number.

It is an amenable number.

86281 is a deficient number, since it is larger than the sum of its proper divisors (6651).

86281 is a wasteful number, since it uses less digits than its factorization.

86281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6650.

The product of its digits is 768, while the sum is 25.

The square root of 86281 is about 293.7362762752. The cubic root of 86281 is about 44.1880723738.

The spelling of 86281 in words is "eighty-six thousand, two hundred eighty-one".