12321224 has 8 divisors (see below), whose sum is σ = 23102310. Its totient is φ = 6160608.

The previous prime is 12321223. The next prime is 12321227. The reversal of 12321224 is 42212321.

It can be written as a sum of positive squares in only one way, i.e., 11356900 + 964324 = 3370^2 + 982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12321223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770069 + ... + 770084.

Almost surely, 2^12321224 is an apocalyptic number.

It is an amenable number.

12321224 is a deficient number, since it is larger than the sum of its proper divisors (10781086).

12321224 is a wasteful number, since it uses less digits than its factorization.

12321224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540159 (or 1540155 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 12321224 is about 3510.1601103084. The cubic root of 12321224 is about 230.9677184827.

Adding to 12321224 its reverse (42212321), we get a palindrome (54533545).

The spelling of 12321224 in words is "twelve million, three hundred twenty-one thousand, two hundred twenty-four".