442003 has 2 divisors, whose sum is σ = 442004. Its totient is φ = 442002.

The previous prime is 441971. The next prime is 442007. The reversal of 442003 is 300244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442003 - 2⁵ = 441971 is a prime.

It is not a weakly prime, because it can be changed into another prime (442007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221001 + 221002.

It is an arithmetic number, because the mean of its divisors is an integer number (221002).

2⁴⁴²⁰⁰³ is an apocalyptic number.

442003 is a deficient number, since it is larger than the sum of its proper divisors (1).

442003 is an equidigital number, since it uses as much as digits as its factorization.

442003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 442003 is about 664.8330617531. The cubic root of 442003 is about 76.1742883702.

Adding to 442003 its reverse (300244), we get a palindrome (742247).

The spelling of 442003 in words is "four hundred forty-two thousand, three", and thus it is an iban number.