128541775 has 24 divisors (see below), whose sum is σ = 166529520. Its totient is φ = 98300160.

The previous prime is 128541767. The next prime is 128541797. The reversal of 128541775 is 577145821.

It is not a de Polignac number, because 128541775 - 2³ = 128541767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76747 + ... + 78403.

It is an arithmetic number, because the mean of its divisors is an integer number (6938730).

Almost surely, 2^128541775 is an apocalyptic number.

128541775 is a deficient number, since it is larger than the sum of its proper divisors (37987745).

128541775 is a wasteful number, since it uses less digits than its factorization.

128541775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803 (or 1798 counting only the distinct ones).

The product of its digits is 78400, while the sum is 40.

The square root of 128541775 is about 11337.6265152809. The cubic root of 128541775 is about 504.6784542625.

The spelling of 128541775 in words is "one hundred twenty-eight million, five hundred forty-one thousand, seven hundred seventy-five".