442042343 has 4 divisors (see below), whose sum is σ = 442405008. Its totient is φ = 441679680.

The previous prime is 442042309. The next prime is 442042351. The reversal of 442042343 is 343240244.

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 442042343 - 2²⁸ = 173606887 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 (442042303) 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, 179498 + ... + 181943.

It is an arithmetic number, because the mean of its divisors is an integer number (110601252).

Almost surely, 2^442042343 is an apocalyptic number.

442042343 is a deficient number, since it is larger than the sum of its proper divisors (362665).

442042343 is a wasteful number, since it uses less digits than its factorization.

442042343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362664.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 442042343 is about 21024.8030430727. The cubic root of 442042343 is about 761.7654841223.

Adding to 442042343 its reverse (343240244), we get a palindrome (785282587).

The spelling of 442042343 in words is "four hundred forty-two million, forty-two thousand, three hundred forty-three".