12128506 has 16 divisors (see below), whose sum is σ = 19701864. Its totient is φ = 5566464.

The previous prime is 12128483. The next prime is 12128507. The reversal of 12128506 is 60582121.

12128506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10182481 + 1946025 = 3191^2 + 1395^2 .

It is a super-3 number, since 3×12128506³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12128507) 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, 3810 + ... + 6226.

Almost surely, 2^12128506 is an apocalyptic number.

12128506 is a deficient number, since it is larger than the sum of its proper divisors (7573358).

12128506 is a wasteful number, since it uses less digits than its factorization.

12128506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12128506 is about 3482.6004651697. The cubic root of 12128506 is about 229.7571854611.

The spelling of 12128506 in words is "twelve million, one hundred twenty-eight thousand, five hundred six".