455101921 has 4 divisors (see below), whose sum is σ = 455358100. Its totient is φ = 454845744.

The previous prime is 455101919. The next prime is 455101939. The reversal of 455101921 is 129101554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129101554 = 2 ⋅64550777.

It can be written as a sum of positive squares in 2 ways, for example, as 354380625 + 100721296 = 18825^2 + 10036^2 .

It is a cyclic number.

It is not a de Polignac number, because 455101921 - 2¹ = 455101919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 455101921.

It is not an unprimeable number, because it can be changed into a prime (455107921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125406 + ... + 128983.

It is an arithmetic number, because the mean of its divisors is an integer number (113839525).

Almost surely, 2^455101921 is an apocalyptic number.

It is an amenable number.

455101921 is a deficient number, since it is larger than the sum of its proper divisors (256179).

455101921 is a wasteful number, since it uses less digits than its factorization.

455101921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256178.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 455101921 is about 21333.1179390168. The cubic root of 455101921 is about 769.1945932826.

The spelling of 455101921 in words is "four hundred fifty-five million, one hundred one thousand, nine hundred twenty-one".