12128140 has 24 divisors (see below), whose sum is σ = 26968032. Its totient is φ = 4565760.

The previous prime is 12128131. The next prime is 12128141. The reversal of 12128140 is 4182121.

It is a happy number.

12128140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12128141) 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, 17496 + ... + 18175.

It is an arithmetic number, because the mean of its divisors is an integer number (1123668).

Almost surely, 2^12128140 is an apocalyptic number.

12128140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12128140 is an abundant number, since it is smaller than the sum of its proper divisors (14839892).

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

12128140 is a wasteful number, since it uses less digits than its factorization.

12128140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35697 (or 35695 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12128140 is about 3482.5479178326. The cubic root of 12128140 is about 229.7548743225.

The spelling of 12128140 in words is "twelve million, one hundred twenty-eight thousand, one hundred forty".