442421003 has 2 divisors, whose sum is σ = 442421004. Its totient is φ = 442421002.

The previous prime is 442420997. The next prime is 442421027. The reversal of 442421003 is 300124244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442421003 - 2⁴ = 442420987 is a prime.

It is not a weakly prime, because it can be changed into another prime (442441003) 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, 221210501 + 221210502.

It is an arithmetic number, because the mean of its divisors is an integer number (221210502).

Almost surely, 2^442421003 is an apocalyptic number.

442421003 is a deficient number, since it is larger than the sum of its proper divisors (1).

442421003 is an equidigital number, since it uses as much as digits as its factorization.

442421003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 442421003 is about 21033.8061938395. The cubic root of 442421003 is about 761.9829352319.

Adding to 442421003 its reverse (300124244), we get a palindrome (742545247).

The spelling of 442421003 in words is "four hundred forty-two million, four hundred twenty-one thousand, three".