Adding to 442520 its reverse (25244), we get a palindrome (467764).
It is a congruent number.
It is an unprimeable number.
2442520 is an apocalyptic number.
442520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 442520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
442520 is a wasteful number, since it uses less digits than its factorization.
442520 is an odious number, because the sum of its binary digits is odd.
The square root of 442520 is about 665.2217675332. The cubic root of 442520 is about 76.2039765264.
The spelling of 442520 in words is "four hundred forty-two thousand, five hundred twenty".