442042243 has 4 divisors (see below), whose sum is σ = 442384360. Its totient is φ = 441700128.

The previous prime is 442042231. The next prime is 442042253. The reversal of 442042243 is 342240244.

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 442042243 - 2⁹ = 442041731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442042213) 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, 169113 + ... + 171706.

It is an arithmetic number, because the mean of its divisors is an integer number (110596090).

Almost surely, 2^442042243 is an apocalyptic number.

442042243 is a deficient number, since it is larger than the sum of its proper divisors (342117).

442042243 is a wasteful number, since it uses less digits than its factorization.

442042243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342116.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 442042243 is about 21024.8006649290. The cubic root of 442042243 is about 761.7654266794.

Adding to 442042243 its reverse (342240244), we get a palindrome (784282487).

The spelling of 442042243 in words is "four hundred forty-two million, forty-two thousand, two hundred forty-three".