442140443 has 4 divisors (see below), whose sum is σ = 442598640. Its totient is φ = 441682248.

The previous prime is 442140407. The next prime is 442140463. The reversal of 442140443 is 344041244.

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 442140443 - 2⁶ = 442140379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442140463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227648 + ... + 229581.

It is an arithmetic number, because the mean of its divisors is an integer number (110649660).

Almost surely, 2^442140443 is an apocalyptic number.

442140443 is a deficient number, since it is larger than the sum of its proper divisors (458197).

442140443 is an equidigital number, since it uses as much as digits as its factorization.

442140443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458196.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 442140443 is about 21027.1358724863. The cubic root of 442140443 is about 761.8218314141.

Adding to 442140443 its reverse (344041244), we get a palindrome (786181687).

The spelling of 442140443 in words is "four hundred forty-two million, one hundred forty thousand, four hundred forty-three".