1323603 has 24 divisors (see below), whose sum is σ = 2083536. Its totient is φ = 806400.

The previous prime is 1323599. The next prime is 1323611. The reversal of 1323603 is 3063231.

It is a happy number.

It is not a de Polignac number, because 1323603 - 2² = 1323599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6168 + ... + 6378.

It is an arithmetic number, because the mean of its divisors is an integer number (86814).

2^1323603 is an apocalyptic number.

1323603 is a deficient number, since it is larger than the sum of its proper divisors (759933).

1323603 is a wasteful number, since it uses less digits than its factorization.

1323603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1323603 is about 1150.4794652665. The cubic root of 1323603 is about 109.7958472356.

Adding to 1323603 its reverse (3063231), we get a palindrome (4386834).

The spelling of 1323603 in words is "one million, three hundred twenty-three thousand, six hundred three".