12183421 has 2 divisors, whose sum is σ = 12183422. Its totient is φ = 12183420.

The previous prime is 12183419. The next prime is 12183439. The reversal of 12183421 is 12438121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 2134521 = 3170^2 + 1461^2 .

It is an emirp because it is prime and its reverse (12438121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12183421 - 2¹ = 12183419 is a prime.

Together with 12183419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12183392 and 12183401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12183401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6091710 + 6091711.

It is an arithmetic number, because the mean of its divisors is an integer number (6091711).

Almost surely, 2^12183421 is an apocalyptic number.

It is an amenable number.

12183421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12183421 is an equidigital number, since it uses as much as digits as its factorization.

12183421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 22.

The square root of 12183421 is about 3490.4757555382. The cubic root of 12183421 is about 230.1034254448.

The spelling of 12183421 in words is "twelve million, one hundred eighty-three thousand, four hundred twenty-one".