85128105 has 8 divisors (see below), whose sum is σ = 136204992. Its totient is φ = 45401648.

The previous prime is 85128097. The next prime is 85128119. The reversal of 85128105 is 50182158.

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

It is a cyclic number.

It is not a de Polignac number, because 85128105 - 2³ = 85128097 is a prime.

It is a Curzon 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, 2837589 + ... + 2837618.

It is an arithmetic number, because the mean of its divisors is an integer number (17025624).

Almost surely, 2^85128105 is an apocalyptic number.

It is an amenable number.

85128105 is a deficient number, since it is larger than the sum of its proper divisors (51076887).

85128105 is a wasteful number, since it uses less digits than its factorization.

85128105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675215.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 85128105 is about 9226.4893106750. The cubic root of 85128105 is about 439.9037409953.

The spelling of 85128105 in words is "eighty-five million, one hundred twenty-eight thousand, one hundred five".