804221 has 8 divisors (see below), whose sum is σ = 886464. Its totient is φ = 723520.

The previous prime is 804211. The next prime is 804239. The reversal of 804221 is 122408.

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 804221 - 2⁶ = 804157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 804221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (110808).

2⁸⁰⁴²²¹ is an apocalyptic number.

It is an amenable number.

804221 is a deficient number, since it is larger than the sum of its proper divisors (82243).

804221 is a wasteful number, since it uses less digits than its factorization.

804221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 804221 is about 896.7836974433. The cubic root of 804221 is about 92.9947582508.

Adding to 804221 its reverse (122408), we get a palindrome (926629).

The spelling of 804221 in words is "eight hundred four thousand, two hundred twenty-one".