12005530 has 32 divisors (see below), whose sum is σ = 22939200. Its totient is φ = 4511232.

The previous prime is 12005527. The next prime is 12005531. The reversal of 12005530 is 3550021.

12005530 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 (12005531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33834 + ... + 34186.

It is an arithmetic number, because the mean of its divisors is an integer number (716850).

Almost surely, 2^12005530 is an apocalyptic number.

12005530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12005530 is a deficient number, since it is larger than the sum of its proper divisors (10933670).

12005530 is a wasteful number, since it uses less digits than its factorization.

12005530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 12005530 is about 3464.8997099483. The cubic root of 12005530 is about 228.9780112752.

Adding to 12005530 its reverse (3550021), we get a palindrome (15555551).

The spelling of 12005530 in words is "twelve million, five thousand, five hundred thirty".