812071 has 4 divisors (see below), whose sum is σ = 874552. Its totient is φ = 749592.

The previous prime is 812057. The next prime is 812081. The reversal of 812071 is 170218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170218 = 2 ⋅85109.

It is a cyclic number.

It is not a de Polignac number, because 812071 - 2¹¹ = 810023 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 (812011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31221 + ... + 31246.

It is an arithmetic number, because the mean of its divisors is an integer number (218638).

2⁸¹²⁰⁷¹ is an apocalyptic number.

812071 is a deficient number, since it is larger than the sum of its proper divisors (62481).

812071 is a wasteful number, since it uses less digits than its factorization.

812071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62480.

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

The square root of 812071 is about 901.1498210620. The cubic root of 812071 is about 93.2963529800.

Adding to 812071 its reverse (170218), we get a palindrome (982289).

The spelling of 812071 in words is "eight hundred twelve thousand, seventy-one".