128807242 has 8 divisors (see below), whose sum is σ = 195016896. Its totient is φ = 63801612.

The previous prime is 128807179. The next prime is 128807243. The reversal of 128807242 is 242708821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128807198 and 128807207.

It is not an unprimeable number, because it can be changed into a prime (128807243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300738 + ... + 301165.

It is an arithmetic number, because the mean of its divisors is an integer number (24377112).

Almost surely, 2^128807242 is an apocalyptic number.

128807242 is a deficient number, since it is larger than the sum of its proper divisors (66209654).

128807242 is a wasteful number, since it uses less digits than its factorization.

128807242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602012.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 128807242 is about 11349.3278215056. The cubic root of 128807242 is about 505.0256393217.

The spelling of 128807242 in words is "one hundred twenty-eight million, eight hundred seven thousand, two hundred forty-two".