4581521 has 16 divisors (see below), whose sum is σ = 5541888. Its totient is φ = 3704400.

The previous prime is 4581497. The next prime is 4581523. The reversal of 4581521 is 1251854.

It is not a de Polignac number, because 4581521 - 2¹⁴ = 4565137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4581523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9086 + ... + 9576.

It is an arithmetic number, because the mean of its divisors is an integer number (346368).

Almost surely, 2^4581521 is an apocalyptic number.

It is an amenable number.

4581521 is a deficient number, since it is larger than the sum of its proper divisors (960367).

4581521 is a wasteful number, since it uses less digits than its factorization.

4581521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its digits is 1600, while the sum is 26.

The square root of 4581521 is about 2140.4487847178. The cubic root of 4581521 is about 166.0873518099.

The spelling of 4581521 in words is "four million, five hundred eighty-one thousand, five hundred twenty-one".