1443221421 has 8 divisors (see below), whose sum is σ = 1943348064. Its totient is φ = 952621200.

The previous prime is 1443221407. The next prime is 1443221449. The reversal of 1443221421 is 1241223441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1443221421 - 2⁵ = 1443221389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1443221391 and 1443221400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443221821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2381251 + ... + 2381856.

It is an arithmetic number, because the mean of its divisors is an integer number (242918508).

Almost surely, 2^1443221421 is an apocalyptic number.

It is an amenable number.

1443221421 is a deficient number, since it is larger than the sum of its proper divisors (500126643).

1443221421 is a wasteful number, since it uses less digits than its factorization.

1443221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763211.

The product of its digits is 1536, while the sum is 24.

The square root of 1443221421 is about 37989.7541581938. The cubic root of 1443221421 is about 1130.0846833970.

Adding to 1443221421 its reverse (1241223441), we get a palindrome (2684444862).

It can be divided in two parts, 14432 and 21421, that added together give a palindrome (35853).

The spelling of 1443221421 in words is "one billion, four hundred forty-three million, two hundred twenty-one thousand, four hundred twenty-one".