128481 has 8 divisors (see below), whose sum is σ = 173280. Its totient is φ = 84672.

The previous prime is 128477. The next prime is 128483. The reversal of 128481 is 184821.

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

It is not a de Polignac number, because 128481 - 2² = 128477 is a prime.

It is a super-2 number, since 2×128481² = 33014734722, which contains 22 as substring.

128481 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128481.

It is not an unprimeable number, because it can be changed into a prime (128483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150 + ... + 528.

It is an arithmetic number, because the mean of its divisors is an integer number (21660).

128481 is a Friedman number, since it can be written as (4+1)^8-2^18, using all its digits and the basic arithmetic operations.

2¹²⁸⁴⁸¹ is an apocalyptic number.

It is an amenable number.

128481 is a deficient number, since it is larger than the sum of its proper divisors (44799).

128481 is a wasteful number, since it uses less digits than its factorization.

128481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495.

The product of its digits is 512, while the sum is 24.

The square root of 128481 is about 358.4424640022. The cubic root of 128481 is about 50.4598903812.

It can be divided in two parts, 1 and 28481, that added together give a palindrome (28482).

The spelling of 128481 in words is "one hundred twenty-eight thousand, four hundred eighty-one".