4538521 has 16 divisors (see below), whose sum is σ = 5233536. Its totient is φ = 3902976.

The previous prime is 4538519. The next prime is 4538537. The reversal of 4538521 is 1258354.

It is a cyclic number.

It is not a de Polignac number, because 4538521 - 2¹ = 4538519 is a prime.

It is a Duffinian number.

4538521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4538521.

It is not an unprimeable number, because it can be changed into a prime (4538561) 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, 12681 + ... + 13033.

It is an arithmetic number, because the mean of its divisors is an integer number (327096).

Almost surely, 2^4538521 is an apocalyptic number.

It is an amenable number.

4538521 is a deficient number, since it is larger than the sum of its proper divisors (695015).

4538521 is a wasteful number, since it uses less digits than its factorization.

4538521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its digits is 4800, while the sum is 28.

The square root of 4538521 is about 2130.3804824491. The cubic root of 4538521 is about 165.5661117810.

The spelling of 4538521 in words is "four million, five hundred thirty-eight thousand, five hundred twenty-one".