128072039 has 4 divisors (see below), whose sum is σ = 130797024. Its totient is φ = 125347056.

The previous prime is 128072023. The next prime is 128072083. The reversal of 128072039 is 930270821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930270821 = 17 ⋅54721813.

It is a cyclic number.

It is not a de Polignac number, because 128072039 - 2⁴ = 128072023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128071996 and 128072014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128072089) 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, 1362422 + ... + 1362515.

It is an arithmetic number, because the mean of its divisors is an integer number (32699256).

Almost surely, 2^128072039 is an apocalyptic number.

128072039 is a deficient number, since it is larger than the sum of its proper divisors (2724985).

128072039 is an equidigital number, since it uses as much as digits as its factorization.

128072039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724984.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 128072039 is about 11316.8917552480. The cubic root of 128072039 is about 504.0629474897.

The spelling of 128072039 in words is "one hundred twenty-eight million, seventy-two thousand, thirty-nine".