450243621 has 6 divisors (see below), whose sum is σ = 650351910. Its totient is φ = 300162408.

The previous prime is 450243617. The next prime is 450243637. The reversal of 450243621 is 126342054.

It can be written as a sum of positive squares in only one way, i.e., 335988900 + 114254721 = 18330^2 + 10689^2 .

It is not a de Polignac number, because 450243621 - 2² = 450243617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450243601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25013526 + ... + 25013543.

It is an arithmetic number, because the mean of its divisors is an integer number (108391985).

Almost surely, 2^450243621 is an apocalyptic number.

It is an amenable number.

450243621 is a deficient number, since it is larger than the sum of its proper divisors (200108289).

450243621 is a wasteful number, since it uses less digits than its factorization.

450243621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50027075 (or 50027072 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 450243621 is about 21218.9448606664. The cubic root of 450243621 is about 766.4476956457.

Adding to 450243621 its reverse (126342054), we get a palindrome (576585675).

The spelling of 450243621 in words is "four hundred fifty million, two hundred forty-three thousand, six hundred twenty-one".