128455205 has 4 divisors (see below), whose sum is σ = 154146252. Its totient is φ = 102764160.

The previous prime is 128455193. The next prime is 128455211. The reversal of 128455205 is 502554821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502554821 = 19661 ⋅25561.

It can be written as a sum of positive squares in 2 ways, for example, as 83484769 + 44970436 = 9137^2 + 6706^2 .

It is not a de Polignac number, because 128455205 - 2⁴ = 128455189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12845516 + ... + 12845525.

It is an arithmetic number, because the mean of its divisors is an integer number (38536563).

Almost surely, 2^128455205 is an apocalyptic number.

It is an amenable number.

128455205 is a deficient number, since it is larger than the sum of its proper divisors (25691047).

128455205 is an equidigital number, since it uses as much as digits as its factorization.

128455205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25691046.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 128455205 is about 11333.8080537832. The cubic root of 128455205 is about 504.5651322821.

The spelling of 128455205 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, two hundred five".