128406254 has 16 divisors (see below), whose sum is σ = 194938800. Its totient is φ = 63431424.

The previous prime is 128406241. The next prime is 128406259. The reversal of 128406254 is 452604821.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128406254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128406259) 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, 62654 + ... + 64670.

It is an arithmetic number, because the mean of its divisors is an integer number (12183675).

Almost surely, 2^128406254 is an apocalyptic number.

128406254 is a deficient number, since it is larger than the sum of its proper divisors (66532546).

128406254 is a wasteful number, since it uses less digits than its factorization.

128406254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 128406254 is about 11331.6483355247. The cubic root of 128406254 is about 504.5010318411.

The spelling of 128406254 in words is "one hundred twenty-eight million, four hundred six thousand, two hundred fifty-four".