442667441 has 2 divisors, whose sum is σ = 442667442. Its totient is φ = 442667440.

The previous prime is 442667431. The next prime is 442667473. The reversal of 442667441 is 144766244.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438274225 + 4393216 = 20935^2 + 2096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442667441 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442667395 and 442667404.

It is not a weakly prime, because it can be changed into another prime (442667411) 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 as a sum of consecutive naturals, namely, 221333720 + 221333721.

It is an arithmetic number, because the mean of its divisors is an integer number (221333721).

Almost surely, 2^442667441 is an apocalyptic number.

It is an amenable number.

442667441 is a deficient number, since it is larger than the sum of its proper divisors (1).

442667441 is an equidigital number, since it uses as much as digits as its factorization.

442667441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 38.

The square root of 442667441 is about 21039.6635191725. The cubic root of 442667441 is about 762.1243892572.

The spelling of 442667441 in words is "four hundred forty-two million, six hundred sixty-seven thousand, four hundred forty-one".