12128635 has 8 divisors (see below), whose sum is σ = 14666256. Its totient is φ = 9628320.

The previous prime is 12128621. The next prime is 12128639. The reversal of 12128635 is 53682121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12128635 - 2⁵ = 12128603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12128639) 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 7 ways as a sum of consecutive naturals, for example, 8604 + ... + 9913.

It is an arithmetic number, because the mean of its divisors is an integer number (1833282).

Almost surely, 2^12128635 is an apocalyptic number.

12128635 is a deficient number, since it is larger than the sum of its proper divisors (2537621).

12128635 is a wasteful number, since it uses less digits than its factorization.

12128635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18653.

The product of its digits is 2880, while the sum is 28.

The square root of 12128635 is about 3482.6189857634. The cubic root of 12128635 is about 229.7580000317.

The spelling of 12128635 in words is "twelve million, one hundred twenty-eight thousand, six hundred thirty-five".