4839921 has 6 divisors (see below), whose sum is σ = 6991010. Its totient is φ = 3226608.

The previous prime is 4839911. The next prime is 4839929. The reversal of 4839921 is 1299384.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 2359296 = 1575^2 + 1536^2 .

It is not a de Polignac number, because 4839921 - 2⁹ = 4839409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4839929) 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 5 ways as a sum of consecutive naturals, for example, 268876 + ... + 268893.

Almost surely, 2^4839921 is an apocalyptic number.

It is an amenable number.

4839921 is a deficient number, since it is larger than the sum of its proper divisors (2151089).

4839921 is a wasteful number, since it uses less digits than its factorization.

4839921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537775 (or 537772 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 4839921 is about 2199.9820453813. The cubic root of 4839921 is about 169.1528908301.

It can be divided in two parts, 483 and 9921, that added together give a square (10404 = 102²).

The spelling of 4839921 in words is "four million, eight hundred thirty-nine thousand, nine hundred twenty-one".