842816441 has 4 divisors (see below), whose sum is σ = 858718692. Its totient is φ = 826914192.

The previous prime is 842816431. The next prime is 842816453. The reversal of 842816441 is 144618248.

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 537266041 + 305550400 = 23179^2 + 17480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842816441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 842816395 and 842816404.

It is not an unprimeable number, because it can be changed into a prime (842816411) 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, 7951046 + ... + 7951151.

It is an arithmetic number, because the mean of its divisors is an integer number (214679673).

Almost surely, 2^842816441 is an apocalyptic number.

It is an amenable number.

842816441 is a deficient number, since it is larger than the sum of its proper divisors (15902251).

842816441 is a wasteful number, since it uses less digits than its factorization.

842816441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15902250.

The product of its digits is 49152, while the sum is 38.

The square root of 842816441 is about 29031.3010559293. The cubic root of 842816441 is about 944.5921519531.

The spelling of 842816441 in words is "eight hundred forty-two million, eight hundred sixteen thousand, four hundred forty-one".