128011543 has 4 divisors (see below), whose sum is σ = 139648968. Its totient is φ = 116374120.

The previous prime is 128011469. The next prime is 128011549. The reversal of 128011543 is 345110821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345110821 = 11 ⋅31373711.

It is a cyclic number.

It is not a de Polignac number, because 128011543 - 2¹⁷ = 127880471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128011549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5818696 + ... + 5818717.

It is an arithmetic number, because the mean of its divisors is an integer number (34912242).

Almost surely, 2^128011543 is an apocalyptic number.

128011543 is a deficient number, since it is larger than the sum of its proper divisors (11637425).

128011543 is a wasteful number, since it uses less digits than its factorization.

128011543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11637424.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 128011543 is about 11314.2186208328. The cubic root of 128011543 is about 503.9835687408.

The spelling of 128011543 in words is "one hundred twenty-eight million, eleven thousand, five hundred forty-three".