450854821 has 4 divisors (see below), whose sum is σ = 450907200. Its totient is φ = 450802444.

The previous prime is 450854801. The next prime is 450854861. The reversal of 450854821 is 128458054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 128458054 = 2 ⋅64229027.

It is a cyclic number.

It is not a de Polignac number, because 450854821 - 2⁷ = 450854693 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 (450854801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9901 + ... + 31618.

It is an arithmetic number, because the mean of its divisors is an integer number (112726800).

Almost surely, 2^450854821 is an apocalyptic number.

It is an amenable number.

450854821 is a deficient number, since it is larger than the sum of its proper divisors (52379).

450854821 is a wasteful number, since it uses less digits than its factorization.

450854821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52378.

The product of its (nonzero) digits is 51200, while the sum is 37.

The square root of 450854821 is about 21233.3422004168. The cubic root of 450854821 is about 766.7943531711.

The spelling of 450854821 in words is "four hundred fifty million, eight hundred fifty-four thousand, eight hundred twenty-one".