12528399 has 16 divisors (see below), whose sum is σ = 18772992. Its totient is φ = 7374048.

The previous prime is 12528379. The next prime is 12528403. The reversal of 12528399 is 99382521.

It is not a de Polignac number, because 12528399 - 2⁸ = 12528143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12528349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6087 + ... + 7880.

It is an arithmetic number, because the mean of its divisors is an integer number (1173312).

Almost surely, 2^12528399 is an apocalyptic number.

12528399 is a deficient number, since it is larger than the sum of its proper divisors (6244593).

12528399 is a wasteful number, since it uses less digits than its factorization.

12528399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14006.

The product of its digits is 38880, while the sum is 39.

The square root of 12528399 is about 3539.5478524806. The cubic root of 12528399 is about 232.2550640561.

The spelling of 12528399 in words is "twelve million, five hundred twenty-eight thousand, three hundred ninety-nine".