128195 has 4 divisors (see below), whose sum is σ = 153840. Its totient is φ = 102552.

The previous prime is 128189. The next prime is 128201. The reversal of 128195 is 591821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (128189) and next prime (128201).

It is a cyclic number.

It is not a de Polignac number, because 128195 - 2¹⁶ = 62659 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12815 + ... + 12824.

It is an arithmetic number, because the mean of its divisors is an integer number (38460).

2¹²⁸¹⁹⁵ is an apocalyptic number.

128195 is a deficient number, since it is larger than the sum of its proper divisors (25645).

128195 is an equidigital number, since it uses as much as digits as its factorization.

128195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25644.

The product of its digits is 720, while the sum is 26.

The square root of 128195 is about 358.0432934716. The cubic root of 128195 is about 50.4224211571.

It can be divided in two parts, 128 and 195, that added together give a palindrome (323).

The spelling of 128195 in words is "one hundred twenty-eight thousand, one hundred ninety-five".