128901249 has 12 divisors (see below), whose sum is σ = 187613712. Its totient is φ = 85277400.

The previous prime is 128901217. The next prime is 128901257. The reversal of 128901249 is 942109821.

It is not a de Polignac number, because 128901249 - 2⁵ = 128901217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128901209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53487 + ... + 55844.

It is an arithmetic number, because the mean of its divisors is an integer number (15634476).

Almost surely, 2^128901249 is an apocalyptic number.

It is an amenable number.

128901249 is a deficient number, since it is larger than the sum of its proper divisors (58712463).

128901249 is a wasteful number, since it uses less digits than its factorization.

128901249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109468 (or 109465 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 128901249 is about 11353.4685889379. The cubic root of 128901249 is about 505.1484698900.

The spelling of 128901249 in words is "one hundred twenty-eight million, nine hundred one thousand, two hundred forty-nine".