1443221 has 8 divisors (see below), whose sum is σ = 1636320. Its totient is φ = 1261872.

The previous prime is 1443203. The next prime is 1443223. The reversal of 1443221 is 1223441.

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 1443221 - 2⁶ = 1443157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1443221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443223) 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, 2675 + ... + 3168.

It is an arithmetic number, because the mean of its divisors is an integer number (204540).

2^1443221 is an apocalyptic number.

It is an amenable number.

1443221 is a deficient number, since it is larger than the sum of its proper divisors (193099).

1443221 is a wasteful number, since it uses less digits than its factorization.

1443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875.

The product of its digits is 192, while the sum is 17.

The square root of 1443221 is about 1201.3413336767. The cubic root of 1443221 is about 113.0084573512.

Adding to 1443221 its reverse (1223441), we get a palindrome (2666662).

The spelling of 1443221 in words is "one million, four hundred forty-three thousand, two hundred twenty-one".