128568543 has 8 divisors (see below), whose sum is σ = 171966768. Its totient is φ = 85441344.

The previous prime is 128568529. The next prime is 128568607. The reversal of 128568543 is 345865821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128568543 - 2⁹ = 128568031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128568495 and 128568504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128568523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66646 + ... + 68547.

It is an arithmetic number, because the mean of its divisors is an integer number (21495846).

Almost surely, 2^128568543 is an apocalyptic number.

128568543 is a deficient number, since it is larger than the sum of its proper divisors (43398225).

128568543 is a wasteful number, since it uses less digits than its factorization.

128568543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135513.

The product of its digits is 230400, while the sum is 42.

The square root of 128568543 is about 11338.8069478230. The cubic root of 128568543 is about 504.7134838478.

The spelling of 128568543 in words is "one hundred twenty-eight million, five hundred sixty-eight thousand, five hundred forty-three".