442443 has 4 divisors (see below), whose sum is σ = 589928.
Its totient is φ = 294960.
The previous prime is 442439. The next prime is 442447. The reversal of 442443 is 344244.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (442439) and next prime (442447).
It is not a de Polignac number, because 442443 - 22 = 442439 is a prime.
It is an Ulam number.
It is a d-powerful number, because it can be written as 42 + 43 + 45 + 211 + 49 + 311 .
It is a D-number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (442447) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73738 + ... + 73743.
It is an arithmetic number, because the mean of its divisors is an integer number (147482).
2442443 is an apocalyptic number.
442443 is a deficient number, since it is larger than the sum of its proper divisors (147485).
442443 is a wasteful number, since it uses less digits than its factorization.
442443 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 147484.
The product of its digits is 1536, while the sum is 21.
The square root of 442443 is about 665.1638895791.
The cubic root of 442443 is about 76.1995563521.
Adding to 442443 its reverse (344244), we get a palindrome (786687).
The spelling of 442443 in words is "four hundred forty-two thousand, four hundred forty-three", and thus it is an iban number.