128508071 has 2 divisors, whose sum is σ = 128508072. Its totient is φ = 128508070.

The previous prime is 128508043. The next prime is 128508101. The reversal of 128508071 is 170805821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128508071 - 2¹⁴ = 128491687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128508271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64254035 + 64254036.

It is an arithmetic number, because the mean of its divisors is an integer number (64254036).

Almost surely, 2^128508071 is an apocalyptic number.

128508071 is a deficient number, since it is larger than the sum of its proper divisors (1).

128508071 is an equidigital number, since it uses as much as digits as its factorization.

128508071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 128508071 is about 11336.1400397137. The cubic root of 128508071 is about 504.6343410562.

The spelling of 128508071 in words is "one hundred twenty-eight million, five hundred eight thousand, seventy-one".