805117 has 8 divisors (see below), whose sum is σ = 839160. Its totient is φ = 771840.

The previous prime is 805111. The next prime is 805121. The reversal of 805117 is 711508.

It can be written as a sum of positive squares in 4 ways, for example, as 11236 + 793881 = 106^2 + 891^2 .

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 805117 - 2³ = 805109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2859 + ... + 3127.

It is an arithmetic number, because the mean of its divisors is an integer number (104895).

2⁸⁰⁵¹¹⁷ is an apocalyptic number.

It is an amenable number.

805117 is a deficient number, since it is larger than the sum of its proper divisors (34043).

805117 is a wasteful number, since it uses less digits than its factorization.

805117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 805117 is about 897.2831214282. The cubic root of 805117 is about 93.0292812565.

The spelling of 805117 in words is "eight hundred five thousand, one hundred seventeen".