1326664 has 8 divisors (see below), whose sum is σ = 2487510. Its totient is φ = 663328.

The previous prime is 1326659. The next prime is 1326673. The reversal of 1326664 is 4666231.

It can be written as a sum of positive squares in only one way, i.e., 1304164 + 22500 = 1142^2 + 150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 polite number, since it can be written as a sum of consecutive naturals, namely, 82909 + ... + 82924.

2^1326664 is an apocalyptic number.

It is an amenable number.

1326664 is a deficient number, since it is larger than the sum of its proper divisors (1160846).

1326664 is a wasteful number, since it uses less digits than its factorization.

1326664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165839 (or 165835 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 1326664 is about 1151.8090119460. The cubic root of 1326664 is about 109.8804210192.

The spelling of 1326664 in words is "one million, three hundred twenty-six thousand, six hundred sixty-four".