450481721 has 2 divisors, whose sum is σ = 450481722. Its totient is φ = 450481720.

The previous prime is 450481711. The next prime is 450481741. The reversal of 450481721 is 127184054.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371911225 + 78570496 = 19285^2 + 8864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450481721 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (450481711) 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, 225240860 + 225240861.

It is an arithmetic number, because the mean of its divisors is an integer number (225240861).

Almost surely, 2^450481721 is an apocalyptic number.

It is an amenable number.

450481721 is a deficient number, since it is larger than the sum of its proper divisors (1).

450481721 is an equidigital number, since it uses as much as digits as its factorization.

450481721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 450481721 is about 21224.5546714177. The cubic root of 450481721 is about 766.5827773575.

The spelling of 450481721 in words is "four hundred fifty million, four hundred eighty-one thousand, seven hundred twenty-one".