128065 has 8 divisors (see below), whose sum is σ = 175680. Its totient is φ = 87792.

The previous prime is 128053. The next prime is 128099. The reversal of 128065 is 560821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128065 - 2⁵ = 128033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795 + ... + 1864.

It is an arithmetic number, because the mean of its divisors is an integer number (21960).

2¹²⁸⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

128065 is a deficient number, since it is larger than the sum of its proper divisors (47615).

128065 is an equidigital number, since it uses as much as digits as its factorization.

128065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671.

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

The square root of 128065 is about 357.8617051320. The cubic root of 128065 is about 50.4053712676.

Adding to 128065 its reverse (560821), we get a palindrome (688886).

The spelling of 128065 in words is "one hundred twenty-eight thousand, sixty-five".