1684812 has 12 divisors (see below), whose sum is σ = 3931256. Its totient is φ = 561600.

The previous prime is 1684801. The next prime is 1684829. The reversal of 1684812 is 2184861.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1684812.

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, 70189 + ... + 70212.

2^1684812 is an apocalyptic number.

1684812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1684812 is an abundant number, since it is smaller than the sum of its proper divisors (2246444).

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

1684812 is a wasteful number, since it uses less digits than its factorization.

1684812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140408 (or 140406 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 1684812 is about 1298.0030816604. The cubic root of 1684812 is about 118.9918314662.

The spelling of 1684812 in words is "one million, six hundred eighty-four thousand, eight hundred twelve".