12132224 has 64 divisors (see below), whose sum is σ = 27246240. Its totient is φ = 5339136.

The previous prime is 12132223. The next prime is 12132259. The reversal of 12132224 is 42223121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12132223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38114 + ... + 38430.

Almost surely, 2^12132224 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 12132224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13623120).

12132224 is an abundant number, since it is smaller than the sum of its proper divisors (15114016).

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

12132224 is a wasteful number, since it uses less digits than its factorization.

12132224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 355 counting only the distinct ones).

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

The square root of 12132224 is about 3483.1342207845. The cubic root of 12132224 is about 229.7806604585.

Adding to 12132224 its reverse (42223121), we get a palindrome (54355345).

The spelling of 12132224 in words is "twelve million, one hundred thirty-two thousand, two hundred twenty-four".