12128529 has 12 divisors (see below), whose sum is σ = 18811824. Its totient is φ = 6930504.

The previous prime is 12128513. The next prime is 12128561. The reversal of 12128529 is 92582121.

12128529 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 12128529 - 2⁴ = 12128513 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 12128496 and 12128505.

It is not an unprimeable number, because it can be changed into a prime (12128509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41107 + ... + 41400.

It is an arithmetic number, because the mean of its divisors is an integer number (1567652).

Almost surely, 2^12128529 is an apocalyptic number.

It is an amenable number.

12128529 is a deficient number, since it is larger than the sum of its proper divisors (6683295).

12128529 is an equidigital number, since it uses as much as digits as its factorization.

12128529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82524 (or 82517 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 12128529 is about 3482.6037672983. The cubic root of 12128529 is about 229.7573306950.

The spelling of 12128529 in words is "twelve million, one hundred twenty-eight thousand, five hundred twenty-nine".