1323643 has 4 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 1316728.

The previous prime is 1323629. The next prime is 1323649. The reversal of 1323643 is 3463231.

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 1323643 - 2⁵ = 1323611 is a prime.

It is a Duffinian number.

1323643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1323649) 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, 3163 + ... + 3556.

It is an arithmetic number, because the mean of its divisors is an integer number (332640).

2^1323643 is an apocalyptic number.

1323643 is a deficient number, since it is larger than the sum of its proper divisors (6917).

1323643 is an equidigital number, since it uses as much as digits as its factorization.

1323643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916.

The product of its digits is 1296, while the sum is 22.

The square root of 1323643 is about 1150.4968491917. The cubic root of 1323643 is about 109.7969532545.

Adding to 1323643 its reverse (3463231), we get a palindrome (4786874).

The spelling of 1323643 in words is "one million, three hundred twenty-three thousand, six hundred forty-three".