143821441 has 2 divisors, whose sum is σ = 143821442. Its totient is φ = 143821440.

The previous prime is 143821439. The next prime is 143821451. The reversal of 143821441 is 144128341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111091600 + 32729841 = 10540^2 + 5721^2 .

It is a cyclic number.

It is not a de Polignac number, because 143821441 - 2¹ = 143821439 is a prime.

Together with 143821439, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143821451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71910720 + 71910721.

It is an arithmetic number, because the mean of its divisors is an integer number (71910721).

Almost surely, 2^143821441 is an apocalyptic number.

It is an amenable number.

143821441 is a deficient number, since it is larger than the sum of its proper divisors (1).

143821441 is an equidigital number, since it uses as much as digits as its factorization.

143821441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 28.

The square root of 143821441 is about 11992.5577338614. The cubic root of 143821441 is about 523.9315424913.

Adding to 143821441 its reverse (144128341), we get a palindrome (287949782).

The spelling of 143821441 in words is "one hundred forty-three million, eight hundred twenty-one thousand, four hundred forty-one".