442747 has 2 divisors, whose sum is σ = 442748. Its totient is φ = 442746.

The previous prime is 442733. The next prime is 442753. The reversal of 442747 is 747244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442747 - 2⁷ = 442619 is a prime.

It is a Chen prime.

442747 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (442777) 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, 221373 + 221374.

It is an arithmetic number, because the mean of its divisors is an integer number (221374).

2⁴⁴²⁷⁴⁷ is an apocalyptic number.

442747 is a deficient number, since it is larger than the sum of its proper divisors (1).

442747 is an equidigital number, since it uses as much as digits as its factorization.

442747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 28.

The square root of 442747 is about 665.3923654506. The cubic root of 442747 is about 76.2170044465.

The spelling of 442747 in words is "four hundred forty-two thousand, seven hundred forty-seven", and thus it is an iban number.