128143 has 4 divisors (see below), whose sum is σ = 129280. Its totient is φ = 127008.

The previous prime is 128119. The next prime is 128147. The reversal of 128143 is 341821.

It is a semiprime because it is the product of two primes.

It is a 5-Lehmer number, since φ(128143) divides (128143-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 128143 - 2⁵ = 128111 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128147) 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 3 ways as a sum of consecutive naturals, for example, 378 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (32320).

2¹²⁸¹⁴³ is an apocalyptic number.

128143 is a deficient number, since it is larger than the sum of its proper divisors (1137).

128143 is a wasteful number, since it uses less digits than its factorization.

128143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136.

The product of its digits is 192, while the sum is 19.

The square root of 128143 is about 357.9706691895. The cubic root of 128143 is about 50.4156025851.

Adding to 128143 its reverse (341821), we get a palindrome (469964).

The spelling of 128143 in words is "one hundred twenty-eight thousand, one hundred forty-three".