812827 has 4 divisors (see below), whose sum is σ = 815256. Its totient is φ = 810400.

The previous prime is 812807. The next prime is 812849. The reversal of 812827 is 728218.

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

It is a cyclic number.

It is not a de Polignac number, because 812827 - 2⁷ = 812699 is a prime.

It is a Duffinian number.

812827 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 812795 and 812804.

It is not an unprimeable number, because it can be changed into a prime (812807) 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, 613 + ... + 1414.

It is an arithmetic number, because the mean of its divisors is an integer number (203814).

2⁸¹²⁸²⁷ is an apocalyptic number.

812827 is a deficient number, since it is larger than the sum of its proper divisors (2429).

812827 is a wasteful number, since it uses less digits than its factorization.

812827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428.

The product of its digits is 1792, while the sum is 28.

The square root of 812827 is about 901.5691875835. The cubic root of 812827 is about 93.3252955096.

The spelling of 812827 in words is "eight hundred twelve thousand, eight hundred twenty-seven".