128155343 has 4 divisors (see below), whose sum is σ = 128273688. Its totient is φ = 128037000.

The previous prime is 128155297. The next prime is 128155387. The reversal of 128155343 is 343551821.

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

It is a cyclic number.

It is not a de Polignac number, because 128155343 - 2²⁰ = 127106767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128155393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57533 + ... + 59718.

It is an arithmetic number, because the mean of its divisors is an integer number (32068422).

Almost surely, 2^128155343 is an apocalyptic number.

128155343 is a deficient number, since it is larger than the sum of its proper divisors (118345).

128155343 is a wasteful number, since it uses less digits than its factorization.

128155343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118344.

The product of its digits is 14400, while the sum is 32.

The square root of 128155343 is about 11320.5716728441. The cubic root of 128155343 is about 504.1722124503.

The spelling of 128155343 in words is "one hundred twenty-eight million, one hundred fifty-five thousand, three hundred forty-three".