128845017 has 24 divisors (see below), whose sum is σ = 213305664. Its totient is φ = 73414944.

The previous prime is 128844979. The next prime is 128845019. The reversal of 128845017 is 710548821.

It is not a de Polignac number, because 128845017 - 2⁷ = 128844889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128845019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20758 + ... + 26240.

It is an arithmetic number, because the mean of its divisors is an integer number (8887736).

Almost surely, 2^128845017 is an apocalyptic number.

It is an amenable number.

128845017 is a deficient number, since it is larger than the sum of its proper divisors (84460647).

128845017 is a wasteful number, since it uses less digits than its factorization.

128845017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5869 (or 5866 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 128845017 is about 11350.9918949843. The cubic root of 128845017 is about 505.0750037276.

The spelling of 128845017 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, seventeen".