442345 has 4 divisors (see below), whose sum is σ = 530820.
Its totient is φ = 353872.
The previous prime is 442333. The next prime is 442363. The reversal of 442345 is 543244.
Adding to 442345 its reverse (543244), we get a palindrome (985589).
It can be divided in two parts, 442 and 345, that added together give a palindrome (787).
It is a happy number.
442345 is nontrivially palindromic in base 4.
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 304704 + 137641 = 552^2 + 371^2
It is a cyclic number.
It is not a de Polignac number, because 442345 - 27 = 442217 is a prime.
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, 44230 + ... + 44239.
It is an arithmetic number, because the mean of its divisors is an integer number (132705).
2442345 is an apocalyptic number.
It is an amenable number.
442345 is a deficient number, since it is larger than the sum of its proper divisors (88475).
442345 is an equidigital number, since it uses as much as digits as its factorization.
442345 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 88474.
The product of its digits is 1920, while the sum is 22.
The square root of 442345 is about 665.0902194439.
The cubic root of 442345 is about 76.1939299340.
The spelling of 442345 in words is "four hundred forty-two thousand, three hundred forty-five".