450006521 has 4 divisors (see below), whose sum is σ = 450074100. Its totient is φ = 449938944.

The previous prime is 450006499. The next prime is 450006553. The reversal of 450006521 is 125600054.

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 373880896 + 76125625 = 19336^2 + 8725^2 .

It is a cyclic number.

It is not a de Polignac number, because 450006521 - 2¹⁴ = 449990137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450006581) 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 in 3 ways as a sum of consecutive naturals, for example, 22556 + ... + 37533.

It is an arithmetic number, because the mean of its divisors is an integer number (112518525).

Almost surely, 2^450006521 is an apocalyptic number.

It is an amenable number.

450006521 is a deficient number, since it is larger than the sum of its proper divisors (67579).

450006521 is an equidigital number, since it uses as much as digits as its factorization.

450006521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67578.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 450006521 is about 21213.3571364836. The cubic root of 450006521 is about 766.3131339341.

Adding to 450006521 its reverse (125600054), we get a palindrome (575606575).

The spelling of 450006521 in words is "four hundred fifty million, six thousand, five hundred twenty-one".