4785821 has 8 divisors (see below), whose sum is σ = 4872504. Its totient is φ = 4700160.

The previous prime is 4785799. The next prime is 4785827. The reversal of 4785821 is 1285874.

It can be written as a sum of positive squares in 4 ways, for example, as 7225 + 4778596 = 85^2 + 2186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4785821 - 2¹⁸ = 4523677 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 (4785827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24701 + ... + 24893.

It is an arithmetic number, because the mean of its divisors is an integer number (609063).

Almost surely, 2^4785821 is an apocalyptic number.

It is an amenable number.

4785821 is a deficient number, since it is larger than the sum of its proper divisors (86683).

4785821 is a wasteful number, since it uses less digits than its factorization.

4785821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its digits is 17920, while the sum is 35.

The square root of 4785821 is about 2187.6519375806. The cubic root of 4785821 is about 168.5202715795.

The spelling of 4785821 in words is "four million, seven hundred eighty-five thousand, eight hundred twenty-one".