455549921 has 4 divisors (see below), whose sum is σ = 455598000. Its totient is φ = 455501844.

The previous prime is 455549873. The next prime is 455549953. The reversal of 455549921 is 129945554.

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.

It is a cyclic number.

It is not a de Polignac number, because 455549921 - 2¹⁰ = 455548897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (455549021) 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, 4571 + ... + 30528.

It is an arithmetic number, because the mean of its divisors is an integer number (113899500).

Almost surely, 2^455549921 is an apocalyptic number.

It is an amenable number.

455549921 is a deficient number, since it is larger than the sum of its proper divisors (48079).

455549921 is a wasteful number, since it uses less digits than its factorization.

455549921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48078.

The product of its digits is 324000, while the sum is 44.

The square root of 455549921 is about 21343.6154622407. The cubic root of 455549921 is about 769.4469075810.

The spelling of 455549921 in words is "four hundred fifty-five million, five hundred forty-nine thousand, nine hundred twenty-one".