809285 has 8 divisors (see below), whose sum is σ = 1028376. Its totient is φ = 609280.

The previous prime is 809273. The next prime is 809297. The reversal of 809285 is 582908.

It is an interprime number because it is at equal distance from previous prime (809273) and next prime (809297).

It can be written as a sum of positive squares in 4 ways, for example, as 146689 + 662596 = 383^2 + 814^2 .

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

It is not a de Polignac number, because 809285 - 2⁴ = 809269 is a prime.

It is a super-2 number, since 2×809285² = 1309884422450, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

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 809285.

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, 4676 + ... + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (128547).

2⁸⁰⁹²⁸⁵ is an apocalyptic number.

809285 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

809285 is a deficient number, since it is larger than the sum of its proper divisors (219091).

809285 is a wasteful number, since it uses less digits than its factorization.

809285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 809285 is about 899.6026900805. The cubic root of 809285 is about 93.1895390642.

The spelling of 809285 in words is "eight hundred nine thousand, two hundred eighty-five".