128641575 has 24 divisors (see below), whose sum is σ = 213343488. Its totient is φ = 68397280.

The previous prime is 128641523. The next prime is 128641613. The reversal of 128641575 is 575146821.

It is not a de Polignac number, because 128641575 - 2¹⁴ = 128625191 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, 23554 + ... + 28496.

It is an arithmetic number, because the mean of its divisors is an integer number (8889312).

Almost surely, 2^128641575 is an apocalyptic number.

128641575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128641575 is a deficient number, since it is larger than the sum of its proper divisors (84701913).

128641575 is a wasteful number, since it uses less digits than its factorization.

128641575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303 (or 5298 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 128641575 is about 11342.0269352528. The cubic root of 128641575 is about 504.8090314760.

The spelling of 128641575 in words is "one hundred twenty-eight million, six hundred forty-one thousand, five hundred seventy-five".