14242421 has 2 divisors, whose sum is σ = 14242422. Its totient is φ = 14242420.

The previous prime is 14242409. The next prime is 14242427. The reversal of 14242421 is 12424241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 4351396 = 3145^2 + 2086^2 .

It is an emirp because it is prime and its reverse (12424241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14242421 - 2¹⁰ = 14241397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 14242393 and 14242402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14242427) 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, 7121210 + 7121211.

It is an arithmetic number, because the mean of its divisors is an integer number (7121211).

Almost surely, 2^14242421 is an apocalyptic number.

It is an amenable number.

14242421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14242421 is an equidigital number, since it uses as much as digits as its factorization.

14242421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512, while the sum is 20.

The square root of 14242421 is about 3773.9132210479. The cubic root of 14242421 is about 242.3973902514.

Adding to 14242421 its reverse (12424241), we get a palindrome (26666662).

The spelling of 14242421 in words is "fourteen million, two hundred forty-two thousand, four hundred twenty-one".