12544422 has 32 divisors (see below), whose sum is σ = 27765504. Its totient is φ = 3746400.

The previous prime is 12544409. The next prime is 12544423. The reversal of 12544422 is 22444521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12544392 and 12544401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12544423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3348 + ... + 6024.

It is an arithmetic number, because the mean of its divisors is an integer number (867672).

Almost surely, 2^12544422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12544422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13882752).

12544422 is an abundant number, since it is smaller than the sum of its proper divisors (15221082).

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

12544422 is a wasteful number, since it uses less digits than its factorization.

12544422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764.

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

The square root of 12544422 is about 3541.8105539399. The cubic root of 12544422 is about 232.3540348699.

Adding to 12544422 its reverse (22444521), we get a palindrome (34988943).

Subtracting 12544422 from its reverse (22444521), we obtain a palindrome (9900099).

The spelling of 12544422 in words is "twelve million, five hundred forty-four thousand, four hundred twenty-two".