85771 has 4 divisors (see below), whose sum is σ = 98032. Its totient is φ = 73512.

The previous prime is 85751. The next prime is 85781. The reversal of 85771 is 17758.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85771 - 2⁷ = 85643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85711) 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, 6120 + ... + 6133.

It is an arithmetic number, because the mean of its divisors is an integer number (24508).

2⁸⁵⁷⁷¹ is an apocalyptic number.

85771 is a deficient number, since it is larger than the sum of its proper divisors (12261).

85771 is a wasteful number, since it uses less digits than its factorization.

85771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260.

The product of its digits is 1960, while the sum is 28.

The square root of 85771 is about 292.8668639502. The cubic root of 85771 is about 44.1008362269.

The spelling of 85771 in words is "eighty-five thousand, seven hundred seventy-one".