128086565 has 8 divisors (see below), whose sum is σ = 153830688. Its totient is φ = 102384720.

The previous prime is 128086561. The next prime is 128086579. The reversal of 128086565 is 565680821.

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

It is not a de Polignac number, because 128086565 - 2² = 128086561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128086561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3467 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (19228836).

Almost surely, 2^128086565 is an apocalyptic number.

It is an amenable number.

128086565 is a deficient number, since it is larger than the sum of its proper divisors (25744123).

128086565 is a wasteful number, since it uses less digits than its factorization.

128086565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21139.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 128086565 is about 11317.5335210460. The cubic root of 128086565 is about 504.0820038000.

The spelling of 128086565 in words is "one hundred twenty-eight million, eighty-six thousand, five hundred sixty-five".