4421539 has 2 divisors, whose sum is σ = 4421540. Its totient is φ = 4421538.

The previous prime is 4421533. The next prime is 4421567. The reversal of 4421539 is 9351244.

It is an a-pointer prime, because the next prime (4421567) can be obtained adding 4421539 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4421539 - 2⁵ = 4421507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4421533) 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, 2210769 + 2210770.

It is an arithmetic number, because the mean of its divisors is an integer number (2210770).

Almost surely, 2^4421539 is an apocalyptic number.

4421539 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421539 is an equidigital number, since it uses as much as digits as its factorization.

4421539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 4421539 is about 2102.7455861326. The cubic root of 4421539 is about 164.1312032559.

The spelling of 4421539 in words is "four million, four hundred twenty-one thousand, five hundred thirty-nine".