1326643 has 4 divisors (see below), whose sum is σ = 1351728. Its totient is φ = 1301560.

The previous prime is 1326641. The next prime is 1326649. The reversal of 1326643 is 3466231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1326643 - 2¹ = 1326641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326641) by changing a digit.

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, 12463 + ... + 12568.

It is an arithmetic number, because the mean of its divisors is an integer number (337932).

2^1326643 is an apocalyptic number.

1326643 is a deficient number, since it is larger than the sum of its proper divisors (25085).

1326643 is an equidigital number, since it uses as much as digits as its factorization.

1326643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25084.

The product of its digits is 2592, while the sum is 25.

The square root of 1326643 is about 1151.7998958152. The cubic root of 1326643 is about 109.8798412439.

The spelling of 1326643 in words is "one million, three hundred twenty-six thousand, six hundred forty-three".