442226 has 8 divisors (see below), whose sum is σ = 679644. Its totient is φ = 215680.

The previous prime is 442217. The next prime is 442229. The reversal of 442226 is 622244.

It is a Cunningham number, because it is equal to 665²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 442225 + 1 = 665^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 442198 and 442207.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442226.

It is not an unprimeable number, because it can be changed into a prime (442229) 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, 2615 + ... + 2778.

2⁴⁴²²²⁶ is an apocalyptic number.

442226 is a deficient number, since it is larger than the sum of its proper divisors (237418).

442226 is a wasteful number, since it uses less digits than its factorization.

442226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436.

The product of its digits is 768, while the sum is 20.

The square root of 442226 is about 665.0007518793. Note that the first 3 decimals coincide. The cubic root of 442226 is about 76.1870967375.

The spelling of 442226 in words is "four hundred forty-two thousand, two hundred twenty-six".