12128379 has 8 divisors (see below), whose sum is σ = 16215360. Its totient is φ = 8063496.

The previous prime is 12128357. The next prime is 12128381. The reversal of 12128379 is 97382121.

12128379 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 12128379 - 2²¹ = 10031227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12128329) 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, 4197 + ... + 6470.

It is an arithmetic number, because the mean of its divisors is an integer number (2026920).

Almost surely, 2^12128379 is an apocalyptic number.

12128379 is a deficient number, since it is larger than the sum of its proper divisors (4086981).

12128379 is a wasteful number, since it uses less digits than its factorization.

12128379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11049.

The product of its digits is 6048, while the sum is 33.

The square root of 12128379 is about 3482.5822316207. The cubic root of 12128379 is about 229.7563835139.

It can be divided in two parts, 1212 and 8379, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 12128379 in words is "twelve million, one hundred twenty-eight thousand, three hundred seventy-nine".