128954121 has 8 divisors (see below), whose sum is σ = 180988320. Its totient is φ = 81444672.

The previous prime is 128954107. The next prime is 128954171. The reversal of 128954121 is 121459821.

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

It is not a de Polignac number, because 128954121 - 2¹¹ = 128952073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128954171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131120 + ... + 1131233.

It is an arithmetic number, because the mean of its divisors is an integer number (22623540).

Almost surely, 2^128954121 is an apocalyptic number.

It is an amenable number.

128954121 is a deficient number, since it is larger than the sum of its proper divisors (52034199).

128954121 is a wasteful number, since it uses less digits than its factorization.

128954121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262375.

The product of its digits is 5760, while the sum is 33.

The square root of 128954121 is about 11355.7968016340. The cubic root of 128954121 is about 505.2175267825.

The spelling of 128954121 in words is "one hundred twenty-eight million, nine hundred fifty-four thousand, one hundred twenty-one".