128423875 has 8 divisors (see below), whose sum is σ = 160273152. Its totient is φ = 102739000.

The previous prime is 128423857. The next prime is 128423891. The reversal of 128423875 is 578324821.

It is a happy number.

It is not a de Polignac number, because 128423875 - 2⁹ = 128423363 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 513571 + ... + 513820.

It is an arithmetic number, because the mean of its divisors is an integer number (20034144).

Almost surely, 2^128423875 is an apocalyptic number.

128423875 is a deficient number, since it is larger than the sum of its proper divisors (31849277).

128423875 is an equidigital number, since it uses as much as digits as its factorization.

128423875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027406 (or 1027396 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 128423875 is about 11332.4258215088. The cubic root of 128423875 is about 504.5241080953.

The spelling of 128423875 in words is "one hundred twenty-eight million, four hundred twenty-three thousand, eight hundred seventy-five".