12528647 has 4 divisors (see below), whose sum is σ = 12539736. Its totient is φ = 12517560.

The previous prime is 12528641. The next prime is 12528653. The reversal of 12528647 is 74682521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (12528641) and next prime (12528653).

It is a cyclic number.

It is not a de Polignac number, because 12528647 - 2⁴ = 12528631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12528641) 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 3 ways as a sum of consecutive naturals, for example, 3629 + ... + 6182.

It is an arithmetic number, because the mean of its divisors is an integer number (3134934).

Almost surely, 2^12528647 is an apocalyptic number.

12528647 is a deficient number, since it is larger than the sum of its proper divisors (11089).

12528647 is an equidigital number, since it uses as much as digits as its factorization.

12528647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11088.

The product of its digits is 26880, while the sum is 35.

The square root of 12528647 is about 3539.5828850304. The cubic root of 12528647 is about 232.2565965444.

The spelling of 12528647 in words is "twelve million, five hundred twenty-eight thousand, six hundred forty-seven".