1443440421 has 12 divisors (see below), whose sum is σ = 2094322048. Its totient is φ = 957977064.

The previous prime is 1443440419. The next prime is 1443440423. The reversal of 1443440421 is 1240443441.

It is an interprime number because it is at equal distance from previous prime (1443440419) and next prime (1443440423).

It is not a de Polignac number, because 1443440421 - 2¹ = 1443440419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443440423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357595 + ... + 361608.

Almost surely, 2^1443440421 is an apocalyptic number.

It is an amenable number.

1443440421 is a deficient number, since it is larger than the sum of its proper divisors (650881627).

1443440421 is a wasteful number, since it uses less digits than its factorization.

1443440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719432 (or 719429 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 1443440421 is about 37992.6364049667. The cubic root of 1443440421 is about 1130.1418416461.

Adding to 1443440421 its reverse (1240443441), we get a palindrome (2683883862).

The spelling of 1443440421 in words is "one billion, four hundred forty-three million, four hundred forty thousand, four hundred twenty-one".