12224520 has 320 divisors, whose sum is σ = 52272000. Its totient is φ = 2540160.

The previous prime is 12224501. The next prime is 12224521. The reversal of 12224520 is 2542221.

12224520 is a `hidden beast` number, since 122 + 24 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12224493 and 12224502.

It is not an unprimeable number, because it can be changed into a prime (12224521) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1111315 + ... + 1111325.

It is an arithmetic number, because the mean of its divisors is an integer number (163350).

Almost surely, 2^12224520 is an apocalyptic number.

12224520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12224520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26136000).

12224520 is an abundant number, since it is smaller than the sum of its proper divisors (40047480).

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

12224520 is a wasteful number, since it uses less digits than its factorization.

12224520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12224520 is about 3496.3581052289. The cubic root of 12224520 is about 230.3618752022.

Adding to 12224520 its reverse (2542221), we get a palindrome (14766741).

It can be divided in two parts, 122245 and 20, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 12224520 in words is "twelve million, two hundred twenty-four thousand, five hundred twenty".