12128429 has 8 divisors (see below), whose sum is σ = 13400640. Its totient is φ = 10918336.

The previous prime is 12128423. The next prime is 12128443. The reversal of 12128429 is 92482121.

12128429 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12128429 - 2⁸ = 12128173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15119 + ... + 15900.

It is an arithmetic number, because the mean of its divisors is an integer number (1675080).

Almost surely, 2^12128429 is an apocalyptic number.

It is an amenable number.

12128429 is a deficient number, since it is larger than the sum of its proper divisors (1272211).

12128429 is a wasteful number, since it uses less digits than its factorization.

12128429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31059.

The product of its digits is 2304, while the sum is 29.

The square root of 12128429 is about 3482.5894101947. The cubic root of 12128429 is about 229.7566992418.

The spelling of 12128429 in words is "twelve million, one hundred twenty-eight thousand, four hundred twenty-nine".