1680812 has 12 divisors (see below), whose sum is σ = 3361680. Its totient is φ = 720336.

The previous prime is 1680803. The next prime is 1680821. The reversal of 1680812 is 2180861.

1680812 = T₄₈₃ + T₄₈₄ + ... + T₄₉₆.

It is an interprime number because it is at equal distance from previous prime (1680803) and next prime (1680821).

1680812 is an admirable number.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

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, 29987 + ... + 30042.

It is an arithmetic number, because the mean of its divisors is an integer number (280140).

2^1680812 is an apocalyptic number.

It is an amenable number.

1680812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1680812 is a wasteful number, since it uses less digits than its factorization.

1680812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60040 (or 60038 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1680812 is about 1296.4613376418. The cubic root of 1680812 is about 118.8975886078.

The spelling of 1680812 in words is "one million, six hundred eighty thousand, eight hundred twelve".