12321604 has 6 divisors (see below), whose sum is σ = 21562814. Its totient is φ = 6160800.

The previous prime is 12321593. The next prime is 12321611. The reversal of 12321604 is 40612321.

It can be written as a sum of positive squares in only one way, i.e., 12264004 + 57600 = 3502^2 + 240^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1540197 + ... + 1540204.

Almost surely, 2^12321604 is an apocalyptic number.

It is an amenable number.

12321604 is a deficient number, since it is larger than the sum of its proper divisors (9241210).

12321604 is a wasteful number, since it uses less digits than its factorization.

12321604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080405 (or 3080403 counting only the distinct ones).

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

The square root of 12321604 is about 3510.2142384761. The cubic root of 12321604 is about 230.9700928905.

Adding to 12321604 its reverse (40612321), we get a palindrome (52933925).

The spelling of 12321604 in words is "twelve million, three hundred twenty-one thousand, six hundred four".