450305257 has 2 divisors, whose sum is σ = 450305258. Its totient is φ = 450305256.

The previous prime is 450305249. The next prime is 450305321. The reversal of 450305257 is 752503054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402363481 + 47941776 = 20059^2 + 6924^2 .

It is a cyclic number.

It is not a de Polignac number, because 450305257 - 2³ = 450305249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (450305227) 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, 225152628 + 225152629.

It is an arithmetic number, because the mean of its divisors is an integer number (225152629).

Almost surely, 2^450305257 is an apocalyptic number.

It is an amenable number.

450305257 is a deficient number, since it is larger than the sum of its proper divisors (1).

450305257 is an equidigital number, since it uses as much as digits as its factorization.

450305257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 450305257 is about 21220.3971923242. The cubic root of 450305257 is about 766.4826682787.

The spelling of 450305257 in words is "four hundred fifty million, three hundred five thousand, two hundred fifty-seven".