442147 has 2 divisors, whose sum is σ = 442148. Its totient is φ = 442146.

The previous prime is 442139. The next prime is 442151. The reversal of 442147 is 741244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442147 - 2³ = 442139 is a prime.

It is not a weakly prime, because it can be changed into another prime (442157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221073 + 221074.

It is an arithmetic number, because the mean of its divisors is an integer number (221074).

2⁴⁴²¹⁴⁷ is an apocalyptic number.

442147 is a deficient number, since it is larger than the sum of its proper divisors (1).

442147 is an equidigital number, since it uses as much as digits as its factorization.

442147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 22.

The square root of 442147 is about 664.9413507972. The cubic root of 442147 is about 76.1825597368.

The spelling of 442147 in words is "four hundred forty-two thousand, one hundred forty-seven", and thus it is an iban number.