442142441 has 4 divisors (see below), whose sum is σ = 476153412. Its totient is φ = 408131472.

The previous prime is 442142413. The next prime is 442142471. The reversal of 442142441 is 144241244.

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

It can be written as a sum of positive squares in 2 ways, for example, as 254562025 + 187580416 = 15955^2 + 13696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442142441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442142441.

It is not an unprimeable number, because it can be changed into a prime (442142471) 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, 17005466 + ... + 17005491.

It is an arithmetic number, because the mean of its divisors is an integer number (119038353).

Almost surely, 2^442142441 is an apocalyptic number.

It is an amenable number.

442142441 is a deficient number, since it is larger than the sum of its proper divisors (34010971).

442142441 is a wasteful number, since it uses less digits than its factorization.

442142441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34010970.

The product of its digits is 4096, while the sum is 26.

The square root of 442142441 is about 21027.1833824695. The cubic root of 442142441 is about 761.8229789512.

Adding to 442142441 its reverse (144241244), we get a palindrome (586383685).

The spelling of 442142441 in words is "four hundred forty-two million, one hundred forty-two thousand, four hundred forty-one".