442445 has 8 divisors (see below), whose sum is σ = 536544. Its totient is φ = 350224.

The previous prime is 442439. The next prime is 442447. The reversal of 442445 is 544244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442445 - 2¹⁰ = 441421 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442445.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 122 + ... + 948.

It is an arithmetic number, because the mean of its divisors is an integer number (67068).

2⁴⁴²⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

442445 is a deficient number, since it is larger than the sum of its proper divisors (94099).

442445 is a wasteful number, since it uses less digits than its factorization.

442445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 2560, while the sum is 23.

The square root of 442445 is about 665.1653929663. The cubic root of 442445 is about 76.1996711683.

Adding to 442445 its reverse (544244), we get a palindrome (986689).

The spelling of 442445 in words is "four hundred forty-two thousand, four hundred forty-five".