12184021 has 2 divisors, whose sum is σ = 12184022. Its totient is φ = 12184020.

The previous prime is 12184009. The next prime is 12184027. The reversal of 12184021 is 12048121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9579025 + 2604996 = 3095^2 + 1614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12184021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12184021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12184027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6092010 + 6092011.

It is an arithmetic number, because the mean of its divisors is an integer number (6092011).

Almost surely, 2^12184021 is an apocalyptic number.

It is an amenable number.

12184021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12184021 is an equidigital number, since it uses as much as digits as its factorization.

12184021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12184021 is about 3490.5617026490. The cubic root of 12184021 is about 230.1072027032.

The spelling of 12184021 in words is "twelve million, one hundred eighty-four thousand, twenty-one".