450584021 has 4 divisors (see below), whose sum is σ = 452518092. Its totient is φ = 448649952.

The previous prime is 450583999. The next prime is 450584027. The reversal of 450584021 is 120485054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192820996 + 257763025 = 13886^2 + 16055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450584021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450584027) 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 3 ways as a sum of consecutive naturals, for example, 966686 + ... + 967151.

It is an arithmetic number, because the mean of its divisors is an integer number (113129523).

Almost surely, 2^450584021 is an apocalyptic number.

It is an amenable number.

450584021 is a deficient number, since it is larger than the sum of its proper divisors (1934071).

450584021 is a wasteful number, since it uses less digits than its factorization.

450584021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934070.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 450584021 is about 21226.9644791713. The cubic root of 450584021 is about 766.6408007867.

The spelling of 450584021 in words is "four hundred fifty million, five hundred eighty-four thousand, twenty-one".