12651224 has 32 divisors (see below), whose sum is σ = 24729600. Its totient is φ = 6060960.

The previous prime is 12651203. The next prime is 12651227. The reversal of 12651224 is 42215621.

It is a happy number.

12651224 is nontrivially palindromic in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 12651224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34289 + ... + 34655.

It is an arithmetic number, because the mean of its divisors is an integer number (772800).

Almost surely, 2^12651224 is an apocalyptic number.

It is an amenable number.

12651224 is a deficient number, since it is larger than the sum of its proper divisors (12078376).

12651224 is a wasteful number, since it uses less digits than its factorization.

12651224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 539 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 12651224 is about 3556.8559149901. The cubic root of 12651224 is about 233.0115855648.

Adding to 12651224 its reverse (42215621), we get a palindrome (54866845).

The spelling of 12651224 in words is "twelve million, six hundred fifty-one thousand, two hundred twenty-four".