455552921 has 2 divisors, whose sum is σ = 455552922. Its totient is φ = 455552920.

The previous prime is 455552869. The next prime is 455552939. The reversal of 455552921 is 129255554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416976400 + 38576521 = 20420^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 455552921 - 2⁶ = 455552857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (455552971) 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 as a sum of consecutive naturals, namely, 227776460 + 227776461.

It is an arithmetic number, because the mean of its divisors is an integer number (227776461).

Almost surely, 2^455552921 is an apocalyptic number.

It is an amenable number.

455552921 is a deficient number, since it is larger than the sum of its proper divisors (1).

455552921 is an equidigital number, since it uses as much as digits as its factorization.

455552921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 38.

The square root of 455552921 is about 21343.6857407525. The cubic root of 455552921 is about 769.4485966279.

The spelling of 455552921 in words is "four hundred fifty-five million, five hundred fifty-two thousand, nine hundred twenty-one".