442745 has 8 divisors (see below), whose sum is σ = 539016. Its totient is φ = 349056.

The previous prime is 442733. The next prime is 442747. The reversal of 442745 is 547244.

It can be written as a sum of positive squares in 4 ways, for example, as 1849 + 440896 = 43^2 + 664^2 .

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 442745 - 2⁸ = 442489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442747) 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, 242 + ... + 971.

It is an arithmetic number, because the mean of its divisors is an integer number (67377).

2⁴⁴²⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

442745 is a deficient number, since it is larger than the sum of its proper divisors (96271).

442745 is a wasteful number, since it uses less digits than its factorization.

442745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its digits is 4480, while the sum is 26.

The square root of 442745 is about 665.3908625763. The cubic root of 442745 is about 76.2168896825.

Adding to 442745 its reverse (547244), we get a palindrome (989989).

The spelling of 442745 in words is "four hundred forty-two thousand, seven hundred forty-five".