442140143 has 4 divisors (see below), whose sum is σ = 442247520. Its totient is φ = 442032768.

The previous prime is 442140133. The next prime is 442140173. The reversal of 442140143 is 341041244.

It is a happy number.

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 442140143 - 2¹⁰ = 442139119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442140133) 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, 47255 + ... + 55832.

It is an arithmetic number, because the mean of its divisors is an integer number (110561880).

Almost surely, 2^442140143 is an apocalyptic number.

442140143 is a deficient number, since it is larger than the sum of its proper divisors (107377).

442140143 is a wasteful number, since it uses less digits than its factorization.

442140143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107376.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 442140143 is about 21027.1287388459. The cubic root of 442140143 is about 761.8216591109.

Adding to 442140143 its reverse (341041244), we get a palindrome (783181387).

The spelling of 442140143 in words is "four hundred forty-two million, one hundred forty thousand, one hundred forty-three".