14221561 has 2 divisors, whose sum is σ = 14221562. Its totient is φ = 14221560.

The previous prime is 14221523. The next prime is 14221573. The reversal of 14221561 is 16512241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13838400 + 383161 = 3720^2 + 619^2 .

It is an emirp because it is prime and its reverse (16512241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14221561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (14221511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7110780 + 7110781.

It is an arithmetic number, because the mean of its divisors is an integer number (7110781).

Almost surely, 2^14221561 is an apocalyptic number.

It is an amenable number.

14221561 is a deficient number, since it is larger than the sum of its proper divisors (1).

14221561 is an equidigital number, since it uses as much as digits as its factorization.

14221561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 14221561 is about 3771.1484987998. The cubic root of 14221561 is about 242.2789909011.

The spelling of 14221561 in words is "fourteen million, two hundred twenty-one thousand, five hundred sixty-one".