128345 has 16 divisors (see below), whose sum is σ = 186240. Its totient is φ = 82944.

The previous prime is 128341. The next prime is 128347. The reversal of 128345 is 543821.

It is a cyclic number.

It is not a de Polignac number, because 128345 - 2² = 128341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128345.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128341) 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 15 ways as a sum of consecutive naturals, for example, 569 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (11640).

2¹²⁸³⁴⁵ is an apocalyptic number.

It is an amenable number.

128345 is a deficient number, since it is larger than the sum of its proper divisors (57895).

128345 is a wasteful number, since it uses less digits than its factorization.

128345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its digits is 960, while the sum is 23.

The square root of 128345 is about 358.2527041070. The cubic root of 128345 is about 50.4420797895.

The spelling of 128345 in words is "one hundred twenty-eight thousand, three hundred forty-five".