445204121 has 2 divisors, whose sum is σ = 445204122. Its totient is φ = 445204120.

The previous prime is 445204093. The next prime is 445204129. The reversal of 445204121 is 121402544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443565721 + 1638400 = 21061^2 + 1280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445204121 is a prime.

It is not a weakly prime, because it can be changed into another prime (445204129) 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, 222602060 + 222602061.

It is an arithmetic number, because the mean of its divisors is an integer number (222602061).

Almost surely, 2^445204121 is an apocalyptic number.

It is an amenable number.

445204121 is a deficient number, since it is larger than the sum of its proper divisors (1).

445204121 is an equidigital number, since it uses as much as digits as its factorization.

445204121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 445204121 is about 21099.8606867439. The cubic root of 445204121 is about 763.5773871562.

Adding to 445204121 its reverse (121402544), we get a palindrome (566606665).

The spelling of 445204121 in words is "four hundred forty-five million, two hundred four thousand, one hundred twenty-one".