128357 has 4 divisors (see below), whose sum is σ = 131136. Its totient is φ = 125580.

The previous prime is 128351. The next prime is 128377. The reversal of 128357 is 753821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128357 - 2⁴ = 128341 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 (128351) 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, 1319 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (32784).

2¹²⁸³⁵⁷ is an apocalyptic number.

It is an amenable number.

128357 is a deficient number, since it is larger than the sum of its proper divisors (2779).

128357 is an equidigital number, since it uses as much as digits as its factorization.

128357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778.

The product of its digits is 1680, while the sum is 26.

The square root of 128357 is about 358.2694516701. The cubic root of 128357 is about 50.4436518183.

The spelling of 128357 in words is "one hundred twenty-eight thousand, three hundred fifty-seven".