442565 has 4 divisors (see below), whose sum is σ = 531084. Its totient is φ = 354048.

The previous prime is 442537. The next prime is 442571. The reversal of 442565 is 565244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 277729 + 164836 = 527^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 442565 - 2⁶ = 442501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442565.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44252 + ... + 44261.

It is an arithmetic number, because the mean of its divisors is an integer number (132771).

2⁴⁴²⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

442565 is a deficient number, since it is larger than the sum of its proper divisors (88519).

442565 is an equidigital number, since it uses as much as digits as its factorization.

442565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88518.

The product of its digits is 4800, while the sum is 26.

The square root of 442565 is about 665.2555899803. The cubic root of 442565 is about 76.2065595077.

The spelling of 442565 in words is "four hundred forty-two thousand, five hundred sixty-five".