82865 has 4 divisors (see below), whose sum is σ = 99444. Its totient is φ = 66288.

The previous prime is 82847. The next prime is 82883. The reversal of 82865 is 56828.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (82847) and next prime (82883).

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 39601 = 208^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 82865 - 2⁸ = 82609 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8282 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (24861).

2⁸²⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

82865 is a deficient number, since it is larger than the sum of its proper divisors (16579).

82865 is a wasteful number, since it uses less digits than its factorization.

82865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578.

The product of its digits is 3840, while the sum is 29.

The square root of 82865 is about 287.8628145489. The cubic root of 82865 is about 43.5970441000.

The spelling of 82865 in words is "eighty-two thousand, eight hundred sixty-five".