12222520 has 16 divisors (see below), whose sum is σ = 27500760. Its totient is φ = 4888992.

The previous prime is 12222517. The next prime is 12222521. The reversal of 12222520 is 2522221.

It is a junction number, because it is equal to n+sod(n) for n = 12222494 and 12222503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152742 + ... + 152821.

Almost surely, 2^12222520 is an apocalyptic number.

12222520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222520 is an abundant number, since it is smaller than the sum of its proper divisors (15278240).

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

12222520 is a wasteful number, since it uses less digits than its factorization.

12222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305574 (or 305570 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 12222520 is about 3496.0720816368. The cubic root of 12222520 is about 230.3493116856.

Adding to 12222520 its reverse (2522221), we get a palindrome (14744741).

The spelling of 12222520 in words is "twelve million, two hundred twenty-two thousand, five hundred twenty".