4829821 has 4 divisors (see below), whose sum is σ = 4840000. Its totient is φ = 4819644.

The previous prime is 4829809. The next prime is 4829843. The reversal of 4829821 is 1289284.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4829821 - 2⁵ = 4829789 is a prime.

It is a Duffinian number.

4829821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4821821) 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 3 ways as a sum of consecutive naturals, for example, 4341 + ... + 5338.

It is an arithmetic number, because the mean of its divisors is an integer number (1210000).

Almost surely, 2^4829821 is an apocalyptic number.

It is an amenable number.

4829821 is a deficient number, since it is larger than the sum of its proper divisors (10179).

4829821 is an equidigital number, since it uses as much as digits as its factorization.

4829821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10178.

The product of its digits is 9216, while the sum is 34.

The square root of 4829821 is about 2197.6853732962. The cubic root of 4829821 is about 169.0351455214.

The spelling of 4829821 in words is "four million, eight hundred twenty-nine thousand, eight hundred twenty-one".