12321603 has 12 divisors (see below), whose sum is σ = 20340528. Its totient is φ = 7040880.

The previous prime is 12321593. The next prime is 12321611. The reversal of 12321603 is 30612321.

It is not a de Polignac number, because 12321603 - 2⁵ = 12321571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12321653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97728 + ... + 97853.

It is an arithmetic number, because the mean of its divisors is an integer number (1695044).

Almost surely, 2^12321603 is an apocalyptic number.

12321603 is a deficient number, since it is larger than the sum of its proper divisors (8018925).

12321603 is a wasteful number, since it uses less digits than its factorization.

12321603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195594 (or 195591 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 12321603 is about 3510.2140960346. The cubic root of 12321603 is about 230.9700866421.

Adding to 12321603 its reverse (30612321), we get a palindrome (42933924).

The spelling of 12321603 in words is "twelve million, three hundred twenty-one thousand, six hundred three".