128430249 has 8 divisors (see below), whose sum is σ = 171792192. Its totient is φ = 85344240.

The previous prime is 128430233. The next prime is 128430259. The reversal of 128430249 is 942034821.

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

It is not a de Polignac number, because 128430249 - 2⁴ = 128430233 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (128430259) 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, 67894 + ... + 69759.

It is an arithmetic number, because the mean of its divisors is an integer number (21474024).

Almost surely, 2^128430249 is an apocalyptic number.

It is an amenable number.

128430249 is a deficient number, since it is larger than the sum of its proper divisors (43361943).

128430249 is a wasteful number, since it uses less digits than its factorization.

128430249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137967.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 128430249 is about 11332.7070464210. The cubic root of 128430249 is about 504.5324548908.

The spelling of 128430249 in words is "one hundred twenty-eight million, four hundred thirty thousand, two hundred forty-nine".