12603321 has 6 divisors (see below), whose sum is σ = 18204810. Its totient is φ = 8402208.

The previous prime is 12603319. The next prime is 12603337. The reversal of 12603321 is 12330621.

12603321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 2433600 = 3189^2 + 1560^2 .

It is not a de Polignac number, because 12603321 - 2¹ = 12603319 is a prime.

12603321 is a modest number, since divided by 3321 gives 126 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12603294 and 12603303.

It is not an unprimeable number, because it can be changed into a prime (12603361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 700176 + ... + 700193.

It is an arithmetic number, because the mean of its divisors is an integer number (3034135).

Almost surely, 2^12603321 is an apocalyptic number.

It is an amenable number.

12603321 is a deficient number, since it is larger than the sum of its proper divisors (5601489).

12603321 is a wasteful number, since it uses less digits than its factorization.

12603321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400375 (or 1400372 counting only the distinct ones).

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

The square root of 12603321 is about 3550.1156319196. The cubic root of 12603321 is about 232.7171194144.

Adding to 12603321 its reverse (12330621), we get a palindrome (24933942).

The spelling of 12603321 in words is "twelve million, six hundred three thousand, three hundred twenty-one".