128459239 has 8 divisors (see below), whose sum is σ = 129554208. Its totient is φ = 127368480.

The previous prime is 128459237. The next prime is 128459249. The reversal of 128459239 is 932954821.

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 128459239 - 2¹ = 128459237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128459195 and 128459204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128459237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92329 + ... + 93709.

It is an arithmetic number, because the mean of its divisors is an integer number (16194276).

Almost surely, 2^128459239 is an apocalyptic number.

128459239 is a deficient number, since it is larger than the sum of its proper divisors (1094969).

128459239 is a wasteful number, since it uses less digits than its factorization.

128459239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105.

The product of its digits is 155520, while the sum is 43.

The square root of 128459239 is about 11333.9860155199. The cubic root of 128459239 is about 504.5704140051.

The spelling of 128459239 in words is "one hundred twenty-eight million, four hundred fifty-nine thousand, two hundred thirty-nine".