12528657 has 24 divisors (see below), whose sum is σ = 19524960. Its totient is φ = 7715520.

The previous prime is 12528653. The next prime is 12528671. The reversal of 12528657 is 75682521.

It is a happy number.

12528657 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12528657 - 2² = 12528653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12528653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6118 + ... + 7904.

It is an arithmetic number, because the mean of its divisors is an integer number (813540).

Almost surely, 2^12528657 is an apocalyptic number.

It is an amenable number.

12528657 is a deficient number, since it is larger than the sum of its proper divisors (6996303).

12528657 is a wasteful number, since it uses less digits than its factorization.

12528657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1850 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 12528657 is about 3539.5842976259. The cubic root of 12528657 is about 232.2566583379.

It can be divided in two parts, 125 and 28657, that added together give a palindrome (28782).

The spelling of 12528657 in words is "twelve million, five hundred twenty-eight thousand, six hundred fifty-seven".