265128 has 16 divisors (see below), whose sum is σ = 662880. Its totient is φ = 88368.

The previous prime is 265123. The next prime is 265129. The reversal of 265128 is 821562.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 11047 = 265128 / (2 + 6 + 5 + 1 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 265098 and 265107.

It is not an unprimeable number, because it can be changed into a prime (265123) by changing a digit.

265128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (41430).

2²⁶⁵¹²⁸ is an apocalyptic number.

It is an amenable number.

265128 is an abundant number, since it is smaller than the sum of its proper divisors (397752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265128 is a wasteful number, since it uses less digits than its factorization.

265128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11056 (or 11052 counting only the distinct ones).

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

The square root of 265128 is about 514.9058166306. The cubic root of 265128 is about 64.2419229098.

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

The spelling of 265128 in words is "two hundred sixty-five thousand, one hundred twenty-eight".