128155 has 12 divisors (see below), whose sum is σ = 164592. Its totient is φ = 95760.

The previous prime is 128153. The next prime is 128159. The reversal of 128155 is 551821.

It is not a de Polignac number, because 128155 - 2¹ = 128153 is a prime.

It is a Duffinian number.

128155 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (128153) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1770 + ... + 1840.

It is an arithmetic number, because the mean of its divisors is an integer number (13716).

2¹²⁸¹⁵⁵ is an apocalyptic number.

128155 is a deficient number, since it is larger than the sum of its proper divisors (36437).

128155 is an equidigital number, since it uses as much as digits as its factorization.

128155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 95 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 128155 is about 357.9874299469. The cubic root of 128155 is about 50.4171762654.

Adding to 128155 its reverse (551821), we get a palindrome (679976).

The spelling of 128155 in words is "one hundred twenty-eight thousand, one hundred fifty-five".