4521996 has 36 divisors (see below), whose sum is σ = 11629800. Its totient is φ = 1481088.

The previous prime is 4521977. The next prime is 4522027. The reversal of 4521996 is 6991254.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 4521996.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1060 + ... + 3188.

It is an arithmetic number, because the mean of its divisors is an integer number (323050).

Almost surely, 2^4521996 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 4521996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5814900).

4521996 is an abundant number, since it is smaller than the sum of its proper divisors (7107804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4521996 is a wasteful number, since it uses less digits than its factorization.

4521996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198 (or 2193 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 4521996 is about 2126.4985304486. The cubic root of 4521996 is about 165.3649223518.

The spelling of 4521996 in words is "four million, five hundred twenty-one thousand, nine hundred ninety-six".