1664912 has 20 divisors (see below), whose sum is σ = 3416076. Its totient is φ = 783360.

The previous prime is 1664909. The next prime is 1664941. The reversal of 1664912 is 2194661.

It can be written as a sum of positive squares in 2 ways, for example, as 712336 + 952576 = 844^2 + 976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789 + ... + 3332.

2^1664912 is an apocalyptic number.

It is an amenable number.

1664912 is an abundant number, since it is smaller than the sum of its proper divisors (1751164).

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

1664912 is a wasteful number, since it uses less digits than its factorization.

1664912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6146 (or 6140 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 1664912 is about 1290.3146902985. The cubic root of 1664912 is about 118.5214877921.

It can be divided in two parts, 16649 and 12, that added together give a palindrome (16661).

The spelling of 1664912 in words is "one million, six hundred sixty-four thousand, nine hundred twelve".