442564561 has 4 divisors (see below), whose sum is σ = 443304000. Its totient is φ = 441825124.

The previous prime is 442564517. The next prime is 442564567. The reversal of 442564561 is 165465244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442564561 - 2⁹ = 442564049 is a prime.

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 442564561.

It is not an unprimeable number, because it can be changed into a prime (442564567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368821 + ... + 370018.

It is an arithmetic number, because the mean of its divisors is an integer number (110826000).

Almost surely, 2^442564561 is an apocalyptic number.

It is an amenable number.

442564561 is a deficient number, since it is larger than the sum of its proper divisors (739439).

442564561 is an equidigital number, since it uses as much as digits as its factorization.

442564561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739438.

The product of its digits is 115200, while the sum is 37.

The square root of 442564561 is about 21037.2184710812. The cubic root of 442564561 is about 762.0653431013.

It can be divided in two parts, 4425 and 64561, that added together give a palindrome (68986).

The spelling of 442564561 in words is "four hundred forty-two million, five hundred sixty-four thousand, five hundred sixty-one".