12024421 has 4 divisors (see below), whose sum is σ = 12032332. Its totient is φ = 12016512.

The previous prime is 12024413. The next prime is 12024451. The reversal of 12024421 is 12442021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9235521 + 2788900 = 3039^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 12024421 - 2³ = 12024413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12024395 and 12024404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12024451) 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, 876 + ... + 4981.

It is an arithmetic number, because the mean of its divisors is an integer number (3008083).

Almost surely, 2^12024421 is an apocalyptic number.

It is an amenable number.

12024421 is a deficient number, since it is larger than the sum of its proper divisors (7911).

12024421 is an equidigital number, since it uses as much as digits as its factorization.

12024421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12024421 is about 3467.6246913413. The cubic root of 12024421 is about 229.0980492012.

Adding to 12024421 its reverse (12442021), we get a palindrome (24466442).

The spelling of 12024421 in words is "twelve million, twenty-four thousand, four hundred twenty-one".