1441226821 has 2 divisors, whose sum is σ = 1441226822. Its totient is φ = 1441226820.

The previous prime is 1441226819. The next prime is 1441226881. The reversal of 1441226821 is 1286221441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109622721 + 331604100 = 33311^2 + 18210^2 .

It is an emirp because it is prime and its reverse (1286221441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1441226821 - 2¹ = 1441226819 is a prime.

Together with 1441226819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1441226881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720613410 + 720613411.

It is an arithmetic number, because the mean of its divisors is an integer number (720613411).

Almost surely, 2^1441226821 is an apocalyptic number.

It is an amenable number.

1441226821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1441226821 is an equidigital number, since it uses as much as digits as its factorization.

1441226821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 1441226821 is about 37963.4932665581. The cubic root of 1441226821 is about 1129.5638332849.

The spelling of 1441226821 in words is "one billion, four hundred forty-one million, two hundred twenty-six thousand, eight hundred twenty-one".