812017 has 4 divisors (see below), whose sum is σ = 825840. Its totient is φ = 798196.

The previous prime is 812011. The next prime is 812033. The reversal of 812017 is 710218.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710218 = 2 ⋅355109.

It is a cyclic number.

It is not a de Polignac number, because 812017 - 2¹⁵ = 779249 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 811985 and 812003.

It is not an unprimeable number, because it can be changed into a prime (812011) 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 3 ways as a sum of consecutive naturals, for example, 6823 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (206460).

2⁸¹²⁰¹⁷ is an apocalyptic number.

It is an amenable number.

812017 is a deficient number, since it is larger than the sum of its proper divisors (13823).

812017 is a wasteful number, since it uses less digits than its factorization.

812017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 812017 is about 901.1198588423. The cubic root of 812017 is about 93.2942849693.

The spelling of 812017 in words is "eight hundred twelve thousand, seventeen".