12003906 has 16 divisors (see below), whose sum is σ = 24162624. Its totient is φ = 3975504.

The previous prime is 12003881. The next prime is 12003911. The reversal of 12003906 is 60930021.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5430 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (1510164).

Almost surely, 2^12003906 is an apocalyptic number.

12003906 is an abundant number, since it is smaller than the sum of its proper divisors (12158718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12003906 is a wasteful number, since it uses less digits than its factorization.

12003906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 12003906 is about 3464.6653518053. The cubic root of 12003906 is about 228.9676861150.

Adding to 12003906 its reverse (60930021), we get a palindrome (72933927).

The spelling of 12003906 in words is "twelve million, three thousand, nine hundred six".