12128406 has 16 divisors (see below), whose sum is σ = 25311744. Its totient is φ = 3866984.

The previous prime is 12128401. The next prime is 12128411. The reversal of 12128406 is 60482121.

It is an interprime number because it is at equal distance from previous prime (12128401) and next prime (12128411).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43806 + ... + 44081.

It is an arithmetic number, because the mean of its divisors is an integer number (1581984).

Almost surely, 2^12128406 is an apocalyptic number.

12128406 is an abundant number, since it is smaller than the sum of its proper divisors (13183338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12128406 is a wasteful number, since it uses less digits than its factorization.

12128406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87915.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12128406 is about 3482.5861080525. The cubic root of 12128406 is about 229.7565540071.

The spelling of 12128406 in words is "twelve million, one hundred twenty-eight thousand, four hundred six".