4538821 has 12 divisors (see below), whose sum is σ = 5316960. Its totient is φ = 3863160.

The previous prime is 4538791. The next prime is 4538851. The reversal of 4538821 is 1288354.

It is an interprime number because it is at equal distance from previous prime (4538791) and next prime (4538851).

It is not a de Polignac number, because 4538821 - 2¹³ = 4530629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4538851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10120 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (443080).

Almost surely, 2^4538821 is an apocalyptic number.

It is an amenable number.

4538821 is a deficient number, since it is larger than the sum of its proper divisors (778139).

4538821 is a wasteful number, since it uses less digits than its factorization.

4538821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 657 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 4538821 is about 2130.4508912434. The cubic root of 4538821 is about 165.5697597197.

The spelling of 4538821 in words is "four million, five hundred thirty-eight thousand, eight hundred twenty-one".