128111005 has 8 divisors (see below), whose sum is σ = 167709024. Its totient is φ = 93171600.

The previous prime is 128110979. The next prime is 128111023. The reversal of 128111005 is 500111821.

It is a happy number.

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

It is not a de Polignac number, because 128111005 - 2⁵ = 128110973 is a prime.

It is a super-2 number, since 2×128111005² = 32824859204220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1164591 + ... + 1164700.

It is an arithmetic number, because the mean of its divisors is an integer number (20963628).

Almost surely, 2^128111005 is an apocalyptic number.

It is an amenable number.

128111005 is a deficient number, since it is larger than the sum of its proper divisors (39598019).

128111005 is a wasteful number, since it uses less digits than its factorization.

128111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329307.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 128111005 is about 11318.6132101066. The cubic root of 128111005 is about 504.1140627978.

Adding to 128111005 its reverse (500111821), we get a palindrome (628222826).

The spelling of 128111005 in words is "one hundred twenty-eight million, one hundred eleven thousand, five".