80865 has 16 divisors (see below), whose sum is σ = 144000. Its totient is φ = 43056.

The previous prime is 80863. The next prime is 80897. The reversal of 80865 is 56808.

It is not a de Polignac number, because 80865 - 2¹ = 80863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165 + ... + 434.

It is an arithmetic number, because the mean of its divisors is an integer number (9000).

2⁸⁰⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

80865 is a deficient number, since it is larger than the sum of its proper divisors (63135).

80865 is a wasteful number, since it uses less digits than its factorization.

80865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 80865 is about 284.3677196870. The cubic root of 80865 is about 43.2434362498.

The spelling of 80865 in words is "eighty thousand, eight hundred sixty-five".