128175145 has 16 divisors (see below), whose sum is σ = 177072768. Its totient is φ = 87246720.

The previous prime is 128175139. The next prime is 128175149. The reversal of 128175145 is 541571821.

It is not a de Polignac number, because 128175145 - 2³ = 128175137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128175145.

It is not an unprimeable number, because it can be changed into a prime (128175149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8571 + ... + 18160.

It is an arithmetic number, because the mean of its divisors is an integer number (11067048).

Almost surely, 2^128175145 is an apocalyptic number.

It is an amenable number.

128175145 is a deficient number, since it is larger than the sum of its proper divisors (48897623).

128175145 is a wasteful number, since it uses less digits than its factorization.

128175145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26880.

The product of its digits is 11200, while the sum is 34.

The square root of 128175145 is about 11321.4462415365. The cubic root of 128175145 is about 504.1981786039.

The spelling of 128175145 in words is "one hundred twenty-eight million, one hundred seventy-five thousand, one hundred forty-five".