12529220 has 24 divisors (see below), whose sum is σ = 28703808. Its totient is φ = 4556000.

The previous prime is 12529207. The next prime is 12529249. The reversal of 12529220 is 2292521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28256 + ... + 28695.

It is an arithmetic number, because the mean of its divisors is an integer number (1195992).

Almost surely, 2^12529220 is an apocalyptic number.

12529220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12529220 is an abundant number, since it is smaller than the sum of its proper divisors (16174588).

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

12529220 is a wasteful number, since it uses less digits than its factorization.

12529220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56971 (or 56969 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12529220 is about 3539.6638258456. The cubic root of 12529220 is about 232.2601372567.

The spelling of 12529220 in words is "twelve million, five hundred twenty-nine thousand, two hundred twenty".