12128527 has 4 divisors (see below), whose sum is σ = 12181720. Its totient is φ = 12075336.

The previous prime is 12128513. The next prime is 12128561. The reversal of 12128527 is 72582121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12128527 - 2⁷ = 12128399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12128495 and 12128504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26253 + ... + 26710.

It is an arithmetic number, because the mean of its divisors is an integer number (3045430).

Almost surely, 2^12128527 is an apocalyptic number.

12128527 is a deficient number, since it is larger than the sum of its proper divisors (53193).

12128527 is an equidigital number, since it uses as much as digits as its factorization.

12128527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53192.

The product of its digits is 2240, while the sum is 28.

The square root of 12128527 is about 3482.6034801568. The cubic root of 12128527 is about 229.7573180660.

The spelling of 12128527 in words is "twelve million, one hundred twenty-eight thousand, five hundred twenty-seven".