128126171 has 2 divisors, whose sum is σ = 128126172. Its totient is φ = 128126170.

The previous prime is 128126087. The next prime is 128126179. The reversal of 128126171 is 171621821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128126171 is a prime.

It is not a weakly prime, because it can be changed into another prime (128126179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64063085 + 64063086.

It is an arithmetic number, because the mean of its divisors is an integer number (64063086).

Almost surely, 2^128126171 is an apocalyptic number.

128126171 is a deficient number, since it is larger than the sum of its proper divisors (1).

128126171 is an equidigital number, since it uses as much as digits as its factorization.

128126171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 128126171 is about 11319.2831486804. The cubic root of 128126171 is about 504.1339546413.

Adding to 128126171 its reverse (171621821), we get a palindrome (299747992).

The spelling of 128126171 in words is "one hundred twenty-eight million, one hundred twenty-six thousand, one hundred seventy-one".