1664512 has 20 divisors (see below), whose sum is σ = 3326796. Its totient is φ = 832000.

The previous prime is 1664501. The next prime is 1664543. The reversal of 1664512 is 2154661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114 + ... + 2137.

2^1664512 is an apocalyptic number.

It is an amenable number.

1664512 is a deficient number, since it is larger than the sum of its proper divisors (1662284).

1664512 is an frugal number, since it uses more digits than its factorization.

1664512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269 (or 3253 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1664512 is about 1290.1596800396. The cubic root of 1664512 is about 118.5119953200.

The spelling of 1664512 in words is "one million, six hundred sixty-four thousand, five hundred twelve".