128371 has 8 divisors (see below), whose sum is σ = 137088. Its totient is φ = 120000.

The previous prime is 128351. The next prime is 128377. The reversal of 128371 is 173821.

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

It is a 6-Lehmer number, since φ(128371) divides (128371-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 128371 - 2⁵ = 128339 is a prime.

It is a super-2 number, since 2×128371² = 32958227282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128377) 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, 1221 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (17136).

2¹²⁸³⁷¹ is an apocalyptic number.

128371 is a deficient number, since it is larger than the sum of its proper divisors (8717).

128371 is a wasteful number, since it uses less digits than its factorization.

128371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173.

The product of its digits is 336, while the sum is 22.

The square root of 128371 is about 358.2889895043. The cubic root of 128371 is about 50.4454857280.

The spelling of 128371 in words is "one hundred twenty-eight thousand, three hundred seventy-one".