128675505 has 32 divisors (see below), whose sum is σ = 247680000. Its totient is φ = 55726272.

The previous prime is 128675489. The next prime is 128675509. The reversal of 128675505 is 505576821.

It is not a de Polignac number, because 128675505 - 2⁴ = 128675489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128675509) 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 31 ways as a sum of consecutive naturals, for example, 30255 + ... + 34244.

It is an arithmetic number, because the mean of its divisors is an integer number (7740000).

Almost surely, 2^128675505 is an apocalyptic number.

128675505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128675505 is a deficient number, since it is larger than the sum of its proper divisors (119004495).

128675505 is a wasteful number, since it uses less digits than its factorization.

128675505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64533.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 128675505 is about 11343.5226010265. The cubic root of 128675505 is about 504.8534097281.

The spelling of 128675505 in words is "one hundred twenty-eight million, six hundred seventy-five thousand, five hundred five".