442130345 has 4 divisors (see below), whose sum is σ = 530556420. Its totient is φ = 353704272.

The previous prime is 442130333. The next prime is 442130389. The reversal of 442130345 is 543031244.

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 212547241 + 229583104 = 14579^2 + 15152^2 .

It is a cyclic number.

It is not a de Polignac number, because 442130345 - 2¹² = 442126249 is a prime.

It is an unprimeable number.

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, 44213030 + ... + 44213039.

It is an arithmetic number, because the mean of its divisors is an integer number (132639105).

Almost surely, 2^442130345 is an apocalyptic number.

It is an amenable number.

442130345 is a deficient number, since it is larger than the sum of its proper divisors (88426075).

442130345 is an equidigital number, since it uses as much as digits as its factorization.

442130345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88426074.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 442130345 is about 21026.8957528210. The cubic root of 442130345 is about 761.8160316465.

Adding to 442130345 its reverse (543031244), we get a palindrome (985161589).

The spelling of 442130345 in words is "four hundred forty-two million, one hundred thirty thousand, three hundred forty-five".