1664812 has 12 divisors (see below), whose sum is σ = 2961616. Its totient is φ = 818640.

The previous prime is 1664807. The next prime is 1664821. The reversal of 1664812 is 2184661.

It is a hoax number, since the sum of its digits (28) 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, 3168 + ... + 3655.

2^1664812 is an apocalyptic number.

It is an amenable number.

1664812 is a deficient number, since it is larger than the sum of its proper divisors (1296804).

1664812 is a wasteful number, since it uses less digits than its factorization.

1664812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6888 (or 6886 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1664812 is about 1290.2759394796. The cubic root of 1664812 is about 118.5191148166.

The spelling of 1664812 in words is "one million, six hundred sixty-four thousand, eight hundred twelve".