12128912 has 30 divisors (see below), whose sum is σ = 24583062. Its totient is φ = 5796736.

The previous prime is 12128911. The next prime is 12128917. The reversal of 12128912 is 21982121.

It can be written as a sum of positive squares in only one way, i.e., 11587216 + 541696 = 3404^2 + 736^2 .

It is a super-2 number, since 2×12128912² = 294221012607488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12128911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7748 + ... + 9180.

Almost surely, 2^12128912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12128912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12291531).

12128912 is an abundant number, since it is smaller than the sum of its proper divisors (12454150).

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

12128912 is a wasteful number, since it uses less digits than its factorization.

12128912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1458 counting only the distinct ones).

The product of its digits is 576, while the sum is 26.

The square root of 12128912 is about 3482.6587544576. The cubic root of 12128912 is about 229.7597491288.

The spelling of 12128912 in words is "twelve million, one hundred twenty-eight thousand, nine hundred twelve".