128498459 has 4 divisors (see below), whose sum is σ = 128564616. Its totient is φ = 128432304.

The previous prime is 128498453. The next prime is 128498471. The reversal of 128498459 is 954894821.

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

It is a cyclic number.

It is not a de Polignac number, because 128498459 - 2⁴ = 128498443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128498453) 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, 30074 + ... + 34079.

It is an arithmetic number, because the mean of its divisors is an integer number (32141154).

Almost surely, 2^128498459 is an apocalyptic number.

128498459 is a deficient number, since it is larger than the sum of its proper divisors (66157).

128498459 is an equidigital number, since it uses as much as digits as its factorization.

128498459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66156.

The product of its digits is 829440, while the sum is 50.

The square root of 128498459 is about 11335.7160779547. The cubic root of 128498459 is about 504.6217590547.

The spelling of 128498459 in words is "one hundred twenty-eight million, four hundred ninety-eight thousand, four hundred fifty-nine".