442123287 has 8 divisors (see below), whose sum is σ = 591419136. Its totient is φ = 293788152.

The previous prime is 442123261. The next prime is 442123307. The reversal of 442123287 is 782321244.

It is a happy number.

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

It is not a de Polignac number, because 442123287 - 2⁶ = 442123223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442123207) 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 7 ways as a sum of consecutive naturals, for example, 239103 + ... + 240944.

It is an arithmetic number, because the mean of its divisors is an integer number (73927392).

Almost surely, 2^442123287 is an apocalyptic number.

442123287 is a deficient number, since it is larger than the sum of its proper divisors (149295849).

442123287 is a wasteful number, since it uses less digits than its factorization.

442123287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480357.

The product of its digits is 21504, while the sum is 33.

The square root of 442123287 is about 21026.7279194838. The cubic root of 442123287 is about 761.8119778448.

The spelling of 442123287 in words is "four hundred forty-two million, one hundred twenty-three thousand, two hundred eighty-seven".