128895 has 16 divisors (see below), whose sum is σ = 222432. Its totient is φ = 63360.

The previous prime is 128879. The next prime is 128903. The reversal of 128895 is 598821.

It is a happy number.

It is not a de Polignac number, because 128895 - 2⁴ = 128879 is a prime.

It is a super-2 number, since 2×128895² = 33227842050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (13902).

2¹²⁸⁸⁹⁵ is an apocalyptic number.

128895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128895 is a deficient number, since it is larger than the sum of its proper divisors (93537).

128895 is a wasteful number, since it uses less digits than its factorization.

128895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682.

The product of its digits is 5760, while the sum is 33.

The square root of 128895 is about 359.0194980778. The cubic root of 128895 is about 50.5140306732.

The spelling of 128895 in words is "one hundred twenty-eight thousand, eight hundred ninety-five".