12021504 has 72 divisors (see below), whose sum is σ = 34927872. Its totient is φ = 3640320.

The previous prime is 12021491. The next prime is 12021539. The reversal of 12021504 is 40512021.

12021504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7737 + ... + 9159.

Almost surely, 2^12021504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17463936).

12021504 is an abundant number, since it is smaller than the sum of its proper divisors (22906368).

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

12021504 is a wasteful number, since it uses less digits than its factorization.

12021504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12021504 is about 3467.2040609113. The cubic root of 12021504 is about 229.0795220983.

Adding to 12021504 its reverse (40512021), we get a palindrome (52533525).

The spelling of 12021504 in words is "twelve million, twenty-one thousand, five hundred four".