12306421 has 2 divisors, whose sum is σ = 12306422. Its totient is φ = 12306420.

The previous prime is 12306409. The next prime is 12306431. The reversal of 12306421 is 12460321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 3960100 = 2889^2 + 1990^2 .

It is a cyclic number.

It is not a de Polignac number, because 12306421 - 2¹¹ = 12304373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12306431) 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, 6153210 + 6153211.

It is an arithmetic number, because the mean of its divisors is an integer number (6153211).

Almost surely, 2^12306421 is an apocalyptic number.

It is an amenable number.

12306421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12306421 is an equidigital number, since it uses as much as digits as its factorization.

12306421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12306421 is about 3508.0508833254. The cubic root of 12306421 is about 230.8751847842.

Adding to 12306421 its reverse (12460321), we get a palindrome (24766742).

The spelling of 12306421 in words is "twelve million, three hundred six thousand, four hundred twenty-one".