442289 has 4 divisors (see below), whose sum is σ = 468324. Its totient is φ = 416256.

The previous prime is 442283. The next prime is 442291. The reversal of 442289 is 982244.

442289 = T₁₄₄ + T₁₄₅ + ... + T₁₇₇.

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 339889 + 102400 = 583^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 442289 - 2⁸ = 442033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442283) 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, 12992 + ... + 13025.

It is an arithmetic number, because the mean of its divisors is an integer number (117081).

2⁴⁴²²⁸⁹ is an apocalyptic number.

It is an amenable number.

442289 is a deficient number, since it is larger than the sum of its proper divisors (26035).

442289 is a wasteful number, since it uses less digits than its factorization.

442289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26034.

The product of its digits is 4608, while the sum is 29.

The square root of 442289 is about 665.0481185599. The cubic root of 442289 is about 76.1907144648.

The spelling of 442289 in words is "four hundred forty-two thousand, two hundred eighty-nine".