12000556 has 12 divisors (see below), whose sum is σ = 21037968. Its totient is φ = 5989712.

The previous prime is 12000551. The next prime is 12000559. The reversal of 12000556 is 65500021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12000551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (1753164).

Almost surely, 2^12000556 is an apocalyptic number.

It is an amenable number.

12000556 is a deficient number, since it is larger than the sum of its proper divisors (9037412).

12000556 is a wasteful number, since it uses less digits than its factorization.

12000556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288 (or 5286 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 12000556 is about 3464.1818658956. The cubic root of 12000556 is about 228.9463843512.

Adding to 12000556 its reverse (65500021), we get a palindrome (77500577).

The spelling of 12000556 in words is "twelve million, five hundred fifty-six", and thus it is an aban number.