65128 has 16 divisors (see below), whose sum is σ = 139680. Its totient is φ = 27888.

The previous prime is 65123. The next prime is 65129. The reversal of 65128 is 82156.

It is a happy number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 65099 and 65108.

It is not an unprimeable number, because it can be changed into a prime (65123) by changing a digit.

65128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526 + ... + 637.

It is an arithmetic number, because the mean of its divisors is an integer number (8730).

2⁶⁵¹²⁸ is an apocalyptic number.

It is an amenable number.

65128 is an abundant number, since it is smaller than the sum of its proper divisors (74552).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69840).

65128 is a wasteful number, since it uses less digits than its factorization.

65128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1172 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 65128 is about 255.2018808708. The cubic root of 65128 is about 40.2336327368.

The spelling of 65128 in words is "sixty-five thousand, one hundred twenty-eight".