442205345 has 8 divisors (see below), whose sum is σ = 530822376. Its totient is φ = 353646976.

The previous prime is 442205321. The next prime is 442205347. The reversal of 442205345 is 543502244.

It can be written as a sum of positive squares in 4 ways, for example, as 162613504 + 279591841 = 12752^2 + 16721^2 .

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 442205345 - 2¹⁶ = 442139809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442205347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4109 + ... + 30021.

It is an arithmetic number, because the mean of its divisors is an integer number (66352797).

Almost surely, 2^442205345 is an apocalyptic number.

It is an amenable number.

442205345 is a deficient number, since it is larger than the sum of its proper divisors (88617031).

442205345 is a wasteful number, since it uses less digits than its factorization.

442205345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29331.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 442205345 is about 21028.6791073524. The cubic root of 442205345 is about 761.8591056499.

Adding to 442205345 its reverse (543502244), we get a palindrome (985707589).

The spelling of 442205345 in words is "four hundred forty-two million, two hundred five thousand, three hundred forty-five".