445243121 has 2 divisors, whose sum is σ = 445243122. Its totient is φ = 445243120.

The previous prime is 445243103. The next prime is 445243129. The reversal of 445243121 is 121342544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223084096 + 222159025 = 14936^2 + 14905^2 .

It is a cyclic number.

It is not a de Polignac number, because 445243121 - 2¹⁰ = 445242097 is a prime.

It is not a weakly prime, because it can be changed into another prime (445243129) 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, 222621560 + 222621561.

It is an arithmetic number, because the mean of its divisors is an integer number (222621561).

Almost surely, 2^445243121 is an apocalyptic number.

It is an amenable number.

445243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

445243121 is an equidigital number, since it uses as much as digits as its factorization.

445243121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 26.

The square root of 445243121 is about 21100.7848432232. The cubic root of 445243121 is about 763.5996830329.

Adding to 445243121 its reverse (121342544), we get a palindrome (566585665).

The spelling of 445243121 in words is "four hundred forty-five million, two hundred forty-three thousand, one hundred twenty-one".