455344021 has 4 divisors (see below), whose sum is σ = 496738944. Its totient is φ = 413949100.

The previous prime is 455344007. The next prime is 455344033. The reversal of 455344021 is 120443554.

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.

It is a cyclic number.

It is not a de Polignac number, because 455344021 - 2⁵ = 455343989 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 (455344061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20697445 + ... + 20697466.

It is an arithmetic number, because the mean of its divisors is an integer number (124184736).

Almost surely, 2^455344021 is an apocalyptic number.

It is an amenable number.

455344021 is a deficient number, since it is larger than the sum of its proper divisors (41394923).

455344021 is a wasteful number, since it uses less digits than its factorization.

455344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41394922.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 455344021 is about 21338.7914606240. The cubic root of 455344021 is about 769.3309649323.

Adding to 455344021 its reverse (120443554), we get a palindrome (575787575).

The spelling of 455344021 in words is "four hundred fifty-five million, three hundred forty-four thousand, twenty-one".