128765255 has 4 divisors (see below), whose sum is σ = 154518312. Its totient is φ = 103012200.

The previous prime is 128765243. The next prime is 128765257. The reversal of 128765255 is 552567821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 128765255 - 2⁴ = 128765239 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 (128765257) 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, 12876521 + ... + 12876530.

It is an arithmetic number, because the mean of its divisors is an integer number (38629578).

Almost surely, 2^128765255 is an apocalyptic number.

128765255 is a deficient number, since it is larger than the sum of its proper divisors (25753057).

128765255 is an equidigital number, since it uses as much as digits as its factorization.

128765255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25753056.

The product of its digits is 168000, while the sum is 41.

The square root of 128765255 is about 11347.4779136159. The cubic root of 128765255 is about 504.9707593434.

The spelling of 128765255 in words is "one hundred twenty-eight million, seven hundred sixty-five thousand, two hundred fifty-five".