128582543 has 4 divisors (see below), whose sum is σ = 136146240. Its totient is φ = 121018848.

The previous prime is 128582539. The next prime is 128582563. The reversal of 128582543 is 345285821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345285821 = 23 ⋅15012427.

It is a cyclic number.

It is not a de Polignac number, because 128582543 - 2² = 128582539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128582497 and 128582506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128582563) 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, 3781823 + ... + 3781856.

It is an arithmetic number, because the mean of its divisors is an integer number (34036560).

Almost surely, 2^128582543 is an apocalyptic number.

128582543 is a deficient number, since it is larger than the sum of its proper divisors (7563697).

128582543 is an equidigital number, since it uses as much as digits as its factorization.

128582543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7563696.

The product of its digits is 76800, while the sum is 38.

The square root of 128582543 is about 11339.4242799183. The cubic root of 128582543 is about 504.7318028242.

The spelling of 128582543 in words is "one hundred twenty-eight million, five hundred eighty-two thousand, five hundred forty-three".