128498259 has 4 divisors (see below), whose sum is σ = 171331016. Its totient is φ = 85665504.

The previous prime is 128498239. The next prime is 128498261. The reversal of 128498259 is 952894821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 128498259 - 2¹¹ = 128496211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128498239) 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, 21416374 + ... + 21416379.

It is an arithmetic number, because the mean of its divisors is an integer number (42832754).

Almost surely, 2^128498259 is an apocalyptic number.

128498259 is a deficient number, since it is larger than the sum of its proper divisors (42832757).

128498259 is an equidigital number, since it uses as much as digits as its factorization.

128498259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42832756.

The product of its digits is 414720, while the sum is 48.

The square root of 128498259 is about 11335.7072562765. The cubic root of 128498259 is about 504.6214972503.

The spelling of 128498259 in words is "one hundred twenty-eight million, four hundred ninety-eight thousand, two hundred fifty-nine".