812873 has 4 divisors (see below), whose sum is σ = 814980. Its totient is φ = 810768.

The previous prime is 812869. The next prime is 812921. The reversal of 812873 is 378218.

812873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 413449 + 399424 = 643^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 812873 - 2² = 812869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (812173) 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, 290 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (203745).

2⁸¹²⁸⁷³ is an apocalyptic number.

It is an amenable number.

812873 is a deficient number, since it is larger than the sum of its proper divisors (2107).

812873 is a wasteful number, since it uses less digits than its factorization.

812873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106.

The product of its digits is 2688, while the sum is 29.

The square root of 812873 is about 901.5946982985. The cubic root of 812873 is about 93.3270559837.

The spelling of 812873 in words is "eight hundred twelve thousand, eight hundred seventy-three".