4921839 has 48 divisors (see below), whose sum is σ = 8386560. Its totient is φ = 2756160.

The previous prime is 4921811. The next prime is 4921841. The reversal of 4921839 is 9381294.

4921839 = 275² + 276² + ... + 328².

It is not a de Polignac number, because 4921839 - 2⁷ = 4921711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4921849) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83392 + ... + 83450.

It is an arithmetic number, because the mean of its divisors is an integer number (174720).

Almost surely, 2^4921839 is an apocalyptic number.

4921839 is a deficient number, since it is larger than the sum of its proper divisors (3464721).

4921839 is a wasteful number, since it uses less digits than its factorization.

4921839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 129 counting only the distinct ones).

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

The square root of 4921839 is about 2218.5218051667. The cubic root of 4921839 is about 170.1018881722.

The spelling of 4921839 in words is "four million, nine hundred twenty-one thousand, eight hundred thirty-nine".