12520228 has 48 divisors (see below), whose sum is σ = 27457920. Its totient is φ = 4870656.

The previous prime is 12520219. The next prime is 12520237. The reversal of 12520228 is 82202521.

12520228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12520219) and next prime (12520237).

It is a super-2 number, since 2×12520228² = 313512218343968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12520199 and 12520208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13351 + ... + 14257.

It is an arithmetic number, because the mean of its divisors is an integer number (572040).

Almost surely, 2^12520228 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 12520228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13728960).

12520228 is an abundant number, since it is smaller than the sum of its proper divisors (14937692).

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

12520228 is a wasteful number, since it uses less digits than its factorization.

12520228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 12520228 is about 3538.3934207490. The cubic root of 12520228 is about 232.2045609591.

Adding to 12520228 its reverse (82202521), we get a palindrome (94722749).

The spelling of 12520228 in words is "twelve million, five hundred twenty thousand, two hundred twenty-eight".