442505 has 16 divisors (see below), whose sum is σ = 622080. Its totient is φ = 295872.

The previous prime is 442501. The next prime is 442517. The reversal of 442505 is 505244.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 442505 - 2² = 442501 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442505.

It is not an unprimeable number, because it can be changed into a prime (442501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511 + ... + 1779.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2⁴⁴²⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

442505 is a deficient number, since it is larger than the sum of its proper divisors (179575).

442505 is a wasteful number, since it uses less digits than its factorization.

442505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 442505 is about 665.2104930020. The cubic root of 442505 is about 76.2031154937.

Adding to 442505 its reverse (505244), we get a palindrome (947749).

The spelling of 442505 in words is "four hundred forty-two thousand, five hundred five".