128868245 has 16 divisors (see below), whose sum is σ = 178625088. Its totient is φ = 88208640.

The previous prime is 128868217. The next prime is 128868253. The reversal of 128868245 is 542868821.

It is not a de Polignac number, because 128868245 - 2⁸ = 128867989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128868196 and 128868205.

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, 67979 + ... + 69848.

It is an arithmetic number, because the mean of its divisors is an integer number (11164068).

Almost surely, 2^128868245 is an apocalyptic number.

It is an amenable number.

128868245 is a deficient number, since it is larger than the sum of its proper divisors (49756843).

128868245 is a wasteful number, since it uses less digits than its factorization.

128868245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137860.

The product of its digits is 245760, while the sum is 44.

The square root of 128868245 is about 11352.0150193699. The cubic root of 128868245 is about 505.1053533096.

The spelling of 128868245 in words is "one hundred twenty-eight million, eight hundred sixty-eight thousand, two hundred forty-five".