128265 has 16 divisors (see below), whose sum is σ = 217728. Its totient is φ = 64256.

The previous prime is 128257. The next prime is 128273. The reversal of 128265 is 562821.

It is an interprime number because it is at equal distance from previous prime (128257) and next prime (128273).

It is a cyclic number.

It is not a de Polignac number, because 128265 - 2³ = 128257 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (13608).

2¹²⁸²⁶⁵ is an apocalyptic number.

128265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128265 is a deficient number, since it is larger than the sum of its proper divisors (89463).

128265 is a wasteful number, since it uses less digits than its factorization.

128265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528.

The product of its digits is 960, while the sum is 24.

The square root of 128265 is about 358.1410336725. The cubic root of 128265 is about 50.4315970928.

It can be divided in two parts, 128 and 265, that added together give a palindrome (393).

The spelling of 128265 in words is "one hundred twenty-eight thousand, two hundred sixty-five".