444145021 has 2 divisors, whose sum is σ = 444145022. Its totient is φ = 444145020.

The previous prime is 444145001. The next prime is 444145027. The reversal of 444145021 is 120541444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403005625 + 41139396 = 20075^2 + 6414^2 .

It is a cyclic number.

It is not a de Polignac number, because 444145021 - 2⁹ = 444144509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444145027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222072510 + 222072511.

It is an arithmetic number, because the mean of its divisors is an integer number (222072511).

Almost surely, 2^444145021 is an apocalyptic number.

It is an amenable number.

444145021 is a deficient number, since it is larger than the sum of its proper divisors (1).

444145021 is an equidigital number, since it uses as much as digits as its factorization.

444145021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 444145021 is about 21074.7484207997. The cubic root of 444145021 is about 762.9714127280.

Adding to 444145021 its reverse (120541444), we get a palindrome (564686465).

The spelling of 444145021 in words is "four hundred forty-four million, one hundred forty-five thousand, twenty-one".