4581216 has 36 divisors (see below), whose sum is σ = 13028652. Its totient is φ = 1526976.

The previous prime is 4581193. The next prime is 4581221. The reversal of 4581216 is 6121854.

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 4581216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7666 + ... + 8241.

It is an arithmetic number, because the mean of its divisors is an integer number (361907).

Almost surely, 2^4581216 is an apocalyptic number.

It is an amenable number.

4581216 is an abundant number, since it is smaller than the sum of its proper divisors (8447436).

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

4581216 is a wasteful number, since it uses less digits than its factorization.

4581216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15923 (or 15912 counting only the distinct ones).

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

The square root of 4581216 is about 2140.3775367911. The cubic root of 4581216 is about 166.0836661514.

The spelling of 4581216 in words is "four million, five hundred eighty-one thousand, two hundred sixteen".