12128057 has 4 divisors (see below), whose sum is σ = 12144756. Its totient is φ = 12111360.

The previous prime is 12128027. The next prime is 12128059. The reversal of 12128057 is 75082121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3013696 + 9114361 = 1736^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 12128057 - 2⁶ = 12127993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12128059) 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, 7208 + ... + 8729.

It is an arithmetic number, because the mean of its divisors is an integer number (3036189).

Almost surely, 2^12128057 is an apocalyptic number.

It is an amenable number.

12128057 is a deficient number, since it is larger than the sum of its proper divisors (16699).

12128057 is an equidigital number, since it uses as much as digits as its factorization.

12128057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16698.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 12128057 is about 3482.5360012497. The cubic root of 12128057 is about 229.7543502053.

The spelling of 12128057 in words is "twelve million, one hundred twenty-eight thousand, fifty-seven".