12003912 has 48 divisors (see below), whose sum is σ = 33637500. Its totient is φ = 3862656.

The previous prime is 12003911. The next prime is 12003961. The reversal of 12003912 is 21930021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 1153476 = 3294^2 + 1074^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12003911) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 787 + ... + 4962.

Almost surely, 2^12003912 is an apocalyptic number.

12003912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12003912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16818750).

12003912 is an abundant number, since it is smaller than the sum of its proper divisors (21633588).

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

12003912 is a wasteful number, since it uses less digits than its factorization.

12003912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790 (or 5783 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12003912 is about 3464.6662176897. Note that the first 3 decimals coincide. The cubic root of 12003912 is about 228.9677242639.

Adding to 12003912 its reverse (21930021), we get a palindrome (33933933).

The spelling of 12003912 in words is "twelve million, three thousand, nine hundred twelve".