4521816 has 48 divisors (see below), whose sum is σ = 13191360. Its totient is φ = 1391040.

The previous prime is 4521799. The next prime is 4521817. The reversal of 4521816 is 6181254.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 4521816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521817) 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 11 ways as a sum of consecutive naturals, for example, 1480 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (274820).

Almost surely, 2^4521816 is an apocalyptic number.

It is an amenable number.

4521816 is an abundant number, since it is smaller than the sum of its proper divisors (8669544).

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

4521816 is a wasteful number, since it uses less digits than its factorization.

4521816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4856 (or 4849 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 4521816 is about 2126.4562069321. The cubic root of 4521816 is about 165.3627281820.

The spelling of 4521816 in words is "four million, five hundred twenty-one thousand, eight hundred sixteen".