128512271 has 2 divisors, whose sum is σ = 128512272. Its totient is φ = 128512270.

The previous prime is 128512229. The next prime is 128512277. The reversal of 128512271 is 172215821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128512271 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 (128512277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64256135 + 64256136.

It is an arithmetic number, because the mean of its divisors is an integer number (64256136).

Almost surely, 2^128512271 is an apocalyptic number.

128512271 is a deficient number, since it is larger than the sum of its proper divisors (1).

128512271 is an equidigital number, since it uses as much as digits as its factorization.

128512271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 29.

The square root of 128512271 is about 11336.3252864409. The cubic root of 128512271 is about 504.6398386127.

The spelling of 128512271 in words is "one hundred twenty-eight million, five hundred twelve thousand, two hundred seventy-one".