128065039 has 4 divisors (see below), whose sum is σ = 128149056. Its totient is φ = 127981024.

The previous prime is 128065033. The next prime is 128065121. The reversal of 128065039 is 930560821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930560821 = 31 ⋅30018091.

It is a cyclic number.

It is not a de Polignac number, because 128065039 - 2⁹ = 128064527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128064995 and 128065013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128065033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39679 + ... + 42784.

It is an arithmetic number, because the mean of its divisors is an integer number (32037264).

Almost surely, 2^128065039 is an apocalyptic number.

128065039 is a deficient number, since it is larger than the sum of its proper divisors (84017).

128065039 is an equidigital number, since it uses as much as digits as its factorization.

128065039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84016.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 128065039 is about 11316.5824788228. The cubic root of 128065039 is about 504.0537638434.

The spelling of 128065039 in words is "one hundred twenty-eight million, sixty-five thousand, thirty-nine".