12604321 has 4 divisors (see below), whose sum is σ = 13010944. Its totient is φ = 12197700.

The previous prime is 12604313. The next prime is 12604337. The reversal of 12604321 is 12340621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12340621 = 2131 ⋅5791.

It is a cyclic number.

It is not a de Polignac number, because 12604321 - 2³ = 12604313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12604351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203265 + ... + 203326.

It is an arithmetic number, because the mean of its divisors is an integer number (3252736).

Almost surely, 2^12604321 is an apocalyptic number.

It is an amenable number.

12604321 is a deficient number, since it is larger than the sum of its proper divisors (406623).

12604321 is an equidigital number, since it uses as much as digits as its factorization.

12604321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406622.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12604321 is about 3550.2564696089. The cubic root of 12604321 is about 232.7232741669.

Adding to 12604321 its reverse (12340621), we get a palindrome (24944942).

The spelling of 12604321 in words is "twelve million, six hundred four thousand, three hundred twenty-one".