128026139 has 2 divisors, whose sum is σ = 128026140. Its totient is φ = 128026138.

The previous prime is 128026117. The next prime is 128026147. The reversal of 128026139 is 931620821.

It is a strong prime.

It is an emirp because it is prime and its reverse (931620821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128026139 - 2¹² = 128022043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128026109) 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 as a sum of consecutive naturals, namely, 64013069 + 64013070.

It is an arithmetic number, because the mean of its divisors is an integer number (64013070).

Almost surely, 2^128026139 is an apocalyptic number.

128026139 is a deficient number, since it is larger than the sum of its proper divisors (1).

128026139 is an equidigital number, since it uses as much as digits as its factorization.

128026139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 128026139 is about 11314.8636315247. The cubic root of 128026139 is about 504.0027229109.

The spelling of 128026139 in words is "one hundred twenty-eight million, twenty-six thousand, one hundred thirty-nine".