12003556 has 12 divisors (see below), whose sum is σ = 21223468. Its totient is φ = 5939712.

The previous prime is 12003553. The next prime is 12003557. The reversal of 12003556 is 65530021.

It is a happy number.

12003556 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 2 ways, for example, as 3182656 + 8820900 = 1784^2 + 2970^2 .

It is not an unprimeable number, because it can be changed into a prime (12003553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15081 + ... + 15856.

Almost surely, 2^12003556 is an apocalyptic number.

It is an amenable number.

12003556 is a deficient number, since it is larger than the sum of its proper divisors (9219912).

12003556 is a wasteful number, since it uses less digits than its factorization.

12003556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31038 (or 31036 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 12003556 is about 3464.6148415084. The cubic root of 12003556 is about 228.9654607430.

Adding to 12003556 its reverse (65530021), we get a palindrome (77533577).

The spelling of 12003556 in words is "twelve million, three thousand, five hundred fifty-six".