2804321 has 16 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 2424576.

The previous prime is 2804311. The next prime is 2804323. The reversal of 2804321 is 1234082.

It is a cyclic number.

It is not a de Polignac number, because 2804321 - 2⁶ = 2804257 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2804293 and 2804302.

It is not an unprimeable number, because it can be changed into a prime (2804323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24761 + ... + 24873.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^2804321 is an apocalyptic number.

It is an amenable number.

2804321 is a deficient number, since it is larger than the sum of its proper divisors (413215).

2804321 is a wasteful number, since it uses less digits than its factorization.

2804321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2804321 is about 1674.6107010287. The cubic root of 2804321 is about 141.0184406577.

It can be divided in two parts, 2804 and 321, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2804321 in words is "two million, eight hundred four thousand, three hundred twenty-one".