943221 has 4 divisors (see below), whose sum is σ = 1257632. Its totient is φ = 628812.

The previous prime is 943219. The next prime is 943231. The reversal of 943221 is 122349.

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 not a de Polignac number, because 943221 - 2¹ = 943219 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 943221.

It is not an unprimeable number, because it can be changed into a prime (943231) 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 3 ways as a sum of consecutive naturals, for example, 157201 + ... + 157206.

It is an arithmetic number, because the mean of its divisors is an integer number (314408).

2⁹⁴³²²¹ is an apocalyptic number.

It is an amenable number.

943221 is a deficient number, since it is larger than the sum of its proper divisors (314411).

943221 is a wasteful number, since it uses less digits than its factorization.

943221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314410.

The product of its digits is 432, while the sum is 21.

The square root of 943221 is about 971.1956548502. The cubic root of 943221 is about 98.0703715021.

It can be divided in two parts, 9432 and 21, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 943221 in words is "nine hundred forty-three thousand, two hundred twenty-one".