128671171 has 8 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 126714120.

The previous prime is 128671159. The next prime is 128671183. The reversal of 128671171 is 171176821.

It is an interprime number because it is at equal distance from previous prime (128671159) and next prime (128671183).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128671171 - 2⁵ = 128671139 is a prime.

It is a super-2 number, since 2×128671171² = 33112540493022482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128671471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32160 + ... + 35938.

It is an arithmetic number, because the mean of its divisors is an integer number (16329600).

Almost surely, 2^128671171 is an apocalyptic number.

128671171 is a deficient number, since it is larger than the sum of its proper divisors (1965629).

128671171 is an equidigital number, since it uses as much as digits as its factorization.

128671171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289.

The product of its digits is 4704, while the sum is 34.

The square root of 128671171 is about 11343.3315652854. The cubic root of 128671171 is about 504.8477415702.

The spelling of 128671171 in words is "one hundred twenty-eight million, six hundred seventy-one thousand, one hundred seventy-one".