450020521 has 8 divisors (see below), whose sum is σ = 480556800. Its totient is φ = 420485520.

The previous prime is 450020503. The next prime is 450020531. The reversal of 450020521 is 125020054.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 450020521 - 2⁵ = 450020489 is a prime.

It is a super-2 number, since 2×450020521² = 405036938642222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450020531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249391 + ... + 251188.

It is an arithmetic number, because the mean of its divisors is an integer number (60069600).

Almost surely, 2^450020521 is an apocalyptic number.

It is an amenable number.

450020521 is a deficient number, since it is larger than the sum of its proper divisors (30536279).

450020521 is a wasteful number, since it uses less digits than its factorization.

450020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500639.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 450020521 is about 21213.6871146908. The cubic root of 450020521 is about 766.3210806875.

Adding to 450020521 its reverse (125020054), we get a palindrome (575040575).

The spelling of 450020521 in words is "four hundred fifty million, twenty thousand, five hundred twenty-one".