1443112421 has 2 divisors, whose sum is σ = 1443112422. Its totient is φ = 1443112420.

The previous prime is 1443112409. The next prime is 1443112477. The reversal of 1443112421 is 1242113441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085373025 + 357739396 = 32945^2 + 18914^2 .

It is an emirp because it is prime and its reverse (1242113441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1443112421 - 2³⁰ = 369370597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1443112481) 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 as a sum of consecutive naturals, namely, 721556210 + 721556211.

It is an arithmetic number, because the mean of its divisors is an integer number (721556211).

Almost surely, 2^1443112421 is an apocalyptic number.

It is an amenable number.

1443112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1443112421 is an equidigital number, since it uses as much as digits as its factorization.

1443112421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

The square root of 1443112421 is about 37988.3195337725. The cubic root of 1443112421 is about 1130.0562326155.

Adding to 1443112421 its reverse (1242113441), we get a palindrome (2685225862).

The spelling of 1443112421 in words is "one billion, four hundred forty-three million, one hundred twelve thousand, four hundred twenty-one".