12445224 has 128 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 3415040.

The previous prime is 12445187. The next prime is 12445249. The reversal of 12445224 is 42254421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 12445194 and 12445203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210907 + ... + 210965.

It is an arithmetic number, because the mean of its divisors is an integer number (291600).

Almost surely, 2^12445224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12445224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18662400).

12445224 is an abundant number, since it is smaller than the sum of its proper divisors (24879576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12445224 is a wasteful number, since it uses less digits than its factorization.

12445224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 139 counting only the distinct ones).

The product of its digits is 2560, while the sum is 24.

The square root of 12445224 is about 3527.7789046367. The cubic root of 12445224 is about 231.7399484079.

Adding to 12445224 its reverse (42254421), we get a palindrome (54699645).

The spelling of 12445224 in words is "twelve million, four hundred forty-five thousand, two hundred twenty-four".