12528209 has 8 divisors (see below), whose sum is σ = 12710880. Its totient is φ = 12347136.

The previous prime is 12528181. The next prime is 12528211. The reversal of 12528209 is 90282521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12528209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12528259) by changing a digit.

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, 26594 + ... + 27060.

It is an arithmetic number, because the mean of its divisors is an integer number (1588860).

Almost surely, 2^12528209 is an apocalyptic number.

It is an amenable number.

12528209 is a deficient number, since it is larger than the sum of its proper divisors (182671).

12528209 is a wasteful number, since it uses less digits than its factorization.

12528209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12528209 is about 3539.5210127926. The cubic root of 12528209 is about 232.2538899586.

The spelling of 12528209 in words is "twelve million, five hundred twenty-eight thousand, two hundred nine".