450321021 has 6 divisors (see below), whose sum is σ = 650463710. Its totient is φ = 300214008.

The previous prime is 450320993. The next prime is 450321037. The reversal of 450321021 is 120123054.

450321021 is a `hidden beast` number, since 450 + 3 + 210 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 417384900 + 32936121 = 20430^2 + 5739^2 .

It is not a de Polignac number, because 450321021 - 2¹⁰ = 450319997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 450320985 and 450321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450521021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25017826 + ... + 25017843.

Almost surely, 2^450321021 is an apocalyptic number.

It is an amenable number.

450321021 is a deficient number, since it is larger than the sum of its proper divisors (200142689).

450321021 is a wasteful number, since it uses less digits than its factorization.

450321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50035675 (or 50035672 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 450321021 is about 21220.7686241569. The cubic root of 450321021 is about 766.4916123535.

Adding to 450321021 its reverse (120123054), we get a palindrome (570444075).

The spelling of 450321021 in words is "four hundred fifty million, three hundred twenty-one thousand, twenty-one".