12421361 has 2 divisors, whose sum is σ = 12421362. Its totient is φ = 12421360.

The previous prime is 12421351. The next prime is 12421391. The reversal of 12421361 is 16312421.

12421361 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10336225 + 2085136 = 3215^2 + 1444^2 .

It is an emirp because it is prime and its reverse (16312421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12421361 - 2¹⁰ = 12420337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12421351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210680 + 6210681.

It is an arithmetic number, because the mean of its divisors is an integer number (6210681).

Almost surely, 2^12421361 is an apocalyptic number.

It is an amenable number.

12421361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421361 is an equidigital number, since it uses as much as digits as its factorization.

12421361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 12421361 is about 3524.3951254080. The cubic root of 12421361 is about 231.5917376390.

Adding to 12421361 its reverse (16312421), we get a palindrome (28733782).

The spelling of 12421361 in words is "twelve million, four hundred twenty-one thousand, three hundred sixty-one".