1000812 has 12 divisors (see below), whose sum is σ = 2335256. Its totient is φ = 333600.

The previous prime is 1000793. The next prime is 1000829. The reversal of 1000812 is 2180001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 83401 = 1000812 / (1 + 0 + 0 + 0 + 8 + 1 + 2).

It is an unprimeable number.

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, 41689 + ... + 41712.

2^1000812 is an apocalyptic number.

1000812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1000812 is an abundant number, since it is smaller than the sum of its proper divisors (1334444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000812 is a wasteful number, since it uses less digits than its factorization.

1000812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83408 (or 83406 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1000812 is about 1000.4059176154. The cubic root of 1000812 is about 100.0270593439.

Adding to 1000812 its reverse (2180001), we get a palindrome (3180813).

The spelling of 1000812 in words is "one million, eight hundred twelve", and thus it is an aban number.