1444745021 has 2 divisors, whose sum is σ = 1444745022. Its totient is φ = 1444745020.

The previous prime is 1444744927. The next prime is 1444745039. The reversal of 1444745021 is 1205474441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1441720900 + 3024121 = 37970^2 + 1739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444745021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444745041) 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 as a sum of consecutive naturals, namely, 722372510 + 722372511.

It is an arithmetic number, because the mean of its divisors is an integer number (722372511).

Almost surely, 2^1444745021 is an apocalyptic number.

It is an amenable number.

1444745021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444745021 is an equidigital number, since it uses as much as digits as its factorization.

1444745021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 1444745021 is about 38009.8016437866. The cubic root of 1444745021 is about 1130.4822180272.

The spelling of 1444745021 in words is "one billion, four hundred forty-four million, seven hundred forty-five thousand, twenty-one".