128734 has 8 divisors (see below), whose sum is σ = 194688. Its totient is φ = 63840.

The previous prime is 128717. The next prime is 128747. The reversal of 128734 is 437821.

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 = 128699 and 128708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214 + ... + 550.

It is an arithmetic number, because the mean of its divisors is an integer number (24336).

2¹²⁸⁷³⁴ is an apocalyptic number.

128734 is a deficient number, since it is larger than the sum of its proper divisors (65954).

128734 is a wasteful number, since it uses less digits than its factorization.

128734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its digits is 1344, while the sum is 25.

The square root of 128734 is about 358.7952062110. The cubic root of 128734 is about 50.4929899102.

The spelling of 128734 in words is "one hundred twenty-eight thousand, seven hundred thirty-four".