442135 has 4 divisors (see below), whose sum is σ = 530568. Its totient is φ = 353704.

The previous prime is 442121. The next prime is 442139. The reversal of 442135 is 531244.

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

It is a cyclic number.

It is not a de Polignac number, because 442135 - 2⁷ = 442007 is a prime.

It is a Duffinian number.

442135 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442139) 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 3 ways as a sum of consecutive naturals, for example, 44209 + ... + 44218.

It is an arithmetic number, because the mean of its divisors is an integer number (132642).

2⁴⁴²¹³⁵ is an apocalyptic number.

442135 is a deficient number, since it is larger than the sum of its proper divisors (88433).

442135 is an equidigital number, since it uses as much as digits as its factorization.

442135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88432.

The product of its digits is 480, while the sum is 19.

The square root of 442135 is about 664.9323273838. The cubic root of 442135 is about 76.1818705248.

Adding to 442135 its reverse (531244), we get a palindrome (973379).

The spelling of 442135 in words is "four hundred forty-two thousand, one hundred thirty-five".