128580133 has 4 divisors (see below), whose sum is σ = 140269248. Its totient is φ = 116891020.

The previous prime is 128580121. The next prime is 128580139. The reversal of 128580133 is 331085821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331085821 = 11 ⋅30098711.

It is a cyclic number.

It is not a de Polignac number, because 128580133 - 2⁹ = 128579621 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128580095 and 128580104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128580139) 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, 5844541 + ... + 5844562.

It is an arithmetic number, because the mean of its divisors is an integer number (35067312).

Almost surely, 2^128580133 is an apocalyptic number.

It is an amenable number.

128580133 is a deficient number, since it is larger than the sum of its proper divisors (11689115).

128580133 is a wasteful number, since it uses less digits than its factorization.

128580133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11689114.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 128580133 is about 11339.3180130024. The cubic root of 128580133 is about 504.7286494381.

It can be divided in two parts, 1285 and 80133, that added together give a palindrome (81418).

The spelling of 128580133 in words is "one hundred twenty-eight million, five hundred eighty thousand, one hundred thirty-three".