809212 has 12 divisors (see below), whose sum is σ = 1430856. Its totient is φ = 400400.

The previous prime is 809203. The next prime is 809213. The reversal of 809212 is 212908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809213) 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, 598 + ... + 1405.

It is an arithmetic number, because the mean of its divisors is an integer number (119238).

2⁸⁰⁹²¹² is an apocalyptic number.

It is an amenable number.

809212 is a deficient number, since it is larger than the sum of its proper divisors (621644).

809212 is a wasteful number, since it uses less digits than its factorization.

809212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 809212 is about 899.5621156985. The cubic root of 809212 is about 93.1867369855.

The spelling of 809212 in words is "eight hundred nine thousand, two hundred twelve".