128315 has 8 divisors (see below), whose sum is σ = 168048. Its totient is φ = 93280.

The previous prime is 128311. The next prime is 128321. The reversal of 128315 is 513821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128315 - 2² = 128311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (21006).

2¹²⁸³¹⁵ is an apocalyptic number.

128315 is a deficient number, since it is larger than the sum of its proper divisors (39733).

128315 is a wasteful number, since it uses less digits than its factorization.

128315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349.

The product of its digits is 240, while the sum is 20.

The square root of 128315 is about 358.2108317737. The cubic root of 128315 is about 50.4381492889.

The spelling of 128315 in words is "one hundred twenty-eight thousand, three hundred fifteen".