128381255 has 8 divisors (see below), whose sum is σ = 155039712. Its totient is φ = 102050208.

The previous prime is 128381251. The next prime is 128381269. The reversal of 128381255 is 552183821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128381255 - 2² = 128381251 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 (128381251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80987 + ... + 82556.

It is an arithmetic number, because the mean of its divisors is an integer number (19379964).

Almost surely, 2^128381255 is an apocalyptic number.

128381255 is a deficient number, since it is larger than the sum of its proper divisors (26658457).

128381255 is a wasteful number, since it uses less digits than its factorization.

128381255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163705.

The product of its digits is 19200, while the sum is 35.

The square root of 128381255 is about 11330.5452207738. The cubic root of 128381255 is about 504.4682898226.

The spelling of 128381255 in words is "one hundred twenty-eight million, three hundred eighty-one thousand, two hundred fifty-five".