450248021 has 2 divisors, whose sum is σ = 450248022. Its totient is φ = 450248020.

The previous prime is 450248017. The next prime is 450248033. The reversal of 450248021 is 120842054.

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., 432057796 + 18190225 = 20786^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 450248021 - 2² = 450248017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450248321) 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, 225124010 + 225124011.

It is an arithmetic number, because the mean of its divisors is an integer number (225124011).

Almost surely, 2^450248021 is an apocalyptic number.

It is an amenable number.

450248021 is a deficient number, since it is larger than the sum of its proper divisors (1).

450248021 is an equidigital number, since it uses as much as digits as its factorization.

450248021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 450248021 is about 21219.0485413461. The cubic root of 450248021 is about 766.4501923377.

The spelling of 450248021 in words is "four hundred fifty million, two hundred forty-eight thousand, twenty-one".