812085 has 8 divisors (see below), whose sum is σ = 1299360. Its totient is φ = 433104.

The previous prime is 812081. The next prime is 812101. The reversal of 812085 is 580218.

812085 = T₃₉₈ + T₃₉₉ + ... + T₄₀₇.

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

It is not a de Polignac number, because 812085 - 2² = 812081 is a prime.

It is a Curzon number.

812085 is a lucky 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 812085.

It is not an unprimeable number, because it can be changed into a prime (812081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27055 + ... + 27084.

It is an arithmetic number, because the mean of its divisors is an integer number (162420).

2⁸¹²⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

812085 is a deficient number, since it is larger than the sum of its proper divisors (487275).

812085 is a wasteful number, since it uses less digits than its factorization.

812085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54147.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 812085 is about 901.1575888822. The cubic root of 812085 is about 93.2968891160.

The spelling of 812085 in words is "eight hundred twelve thousand, eighty-five".