805985 has 8 divisors (see below), whose sum is σ = 972096. Its totient is φ = 641520.

The previous prime is 805967. The next prime is 805991. The reversal of 805985 is 589508.

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

It is not a de Polignac number, because 805985 - 2⁸ = 805729 is a prime.

It is a super-2 number, since 2×805985² = 1299223640450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1412 + ... + 1898.

It is an arithmetic number, because the mean of its divisors is an integer number (121512).

2⁸⁰⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

805985 is a deficient number, since it is larger than the sum of its proper divisors (166111).

805985 is a wasteful number, since it uses less digits than its factorization.

805985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 805985 is about 897.7666734737. The cubic root of 805985 is about 93.0627010016.

The spelling of 805985 in words is "eight hundred five thousand, nine hundred eighty-five".