128127165 has 16 divisors (see below), whose sum is σ = 215793600. Its totient is φ = 64737792.

The previous prime is 128127163. The next prime is 128127179. The reversal of 128127165 is 561721821.

It is not a de Polignac number, because 128127165 - 2¹ = 128127163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128127163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224500 + ... + 225069.

It is an arithmetic number, because the mean of its divisors is an integer number (13487100).

Almost surely, 2^128127165 is an apocalyptic number.

128127165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128127165 is a deficient number, since it is larger than the sum of its proper divisors (87666435).

128127165 is a wasteful number, since it uses less digits than its factorization.

128127165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449596.

The product of its digits is 6720, while the sum is 33.

The square root of 128127165 is about 11319.3270559694. The cubic root of 128127165 is about 504.1352583246.

Adding to 128127165 its reverse (561721821), we get a palindrome (689848986).

The spelling of 128127165 in words is "one hundred twenty-eight million, one hundred twenty-seven thousand, one hundred sixty-five".