It is an alternating number because its digits alternate between even and odd.
It is a congruent number.
It is an unprimeable number.
Almost surely, 24521456 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 4521456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6702696).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
4521456 is a wasteful number, since it uses less digits than its factorization.
4521456 is an odious number, because the sum of its binary digits is odd.
The square root of 4521456 is about 2126.3715573719. The cubic root of 4521456 is about 165.3583396678.
The spelling of 4521456 in words is "four million, five hundred twenty-one thousand, four hundred fifty-six".