873221 has 4 divisors (see below), whose sum is σ = 919200. Its totient is φ = 827244.

The previous prime is 873209. The next prime is 873247. The reversal of 873221 is 122378.

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 873221 - 2⁶ = 873157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22961 + ... + 22998.

It is an arithmetic number, because the mean of its divisors is an integer number (229800).

2⁸⁷³²²¹ is an apocalyptic number.

It is an amenable number.

873221 is a deficient number, since it is larger than the sum of its proper divisors (45979).

873221 is a wasteful number, since it uses less digits than its factorization.

873221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45978.

The product of its digits is 672, while the sum is 23.

The square root of 873221 is about 934.4629473660. The cubic root of 873221 is about 95.5816941193.

Adding to 873221 its reverse (122378), we get a palindrome (995599).

The spelling of 873221 in words is "eight hundred seventy-three thousand, two hundred twenty-one".