805871 has 8 divisors (see below), whose sum is σ = 894288. Its totient is φ = 720000.

The previous prime is 805867. The next prime is 805873. The reversal of 805871 is 178508.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 805871 - 2² = 805867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805871.

It is not an unprimeable number, because it can be changed into a prime (805873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (111786).

2⁸⁰⁵⁸⁷¹ is an apocalyptic number.

805871 is a deficient number, since it is larger than the sum of its proper divisors (88417).

805871 is a wasteful number, since it uses less digits than its factorization.

805871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 805871 is about 897.7031803441. The cubic root of 805871 is about 93.0583131416.

The spelling of 805871 in words is "eight hundred five thousand, eight hundred seventy-one".