128518 has 8 divisors (see below), whose sum is σ = 207648. Its totient is φ = 59304.

The previous prime is 128509. The next prime is 128519. The reversal of 128518 is 815821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128492 and 128501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128519) 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, 2446 + ... + 2497.

It is an arithmetic number, because the mean of its divisors is an integer number (25956).

2¹²⁸⁵¹⁸ is an apocalyptic number.

128518 is a deficient number, since it is larger than the sum of its proper divisors (79130).

128518 is a wasteful number, since it uses less digits than its factorization.

128518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958.

The product of its digits is 640, while the sum is 25.

The square root of 128518 is about 358.4940724754. The cubic root of 128518 is about 50.4647337348.

It can be divided in two parts, 128 and 518, that added together give a palindrome (646).

The spelling of 128518 in words is "one hundred twenty-eight thousand, five hundred eighteen".