128901123 has 48 divisors (see below), whose sum is σ = 213988320. Its totient is φ = 74068992.

The previous prime is 128901109. The next prime is 128901161. The reversal of 128901123 is 321109821.

It is not a de Polignac number, because 128901123 - 2¹³ = 128892931 is a prime.

It is a super-2 number, since 2×128901123² = 33230999021322258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128901173) 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 47 ways as a sum of consecutive naturals, for example, 455340 + ... + 455622.

It is an arithmetic number, because the mean of its divisors is an integer number (4458090).

Almost surely, 2^128901123 is an apocalyptic number.

128901123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128901123 is a deficient number, since it is larger than the sum of its proper divisors (85087197).

128901123 is a wasteful number, since it uses less digits than its factorization.

128901123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 128901123 is about 11353.4630399715. The cubic root of 128901123 is about 505.1483052970.

The spelling of 128901123 in words is "one hundred twenty-eight million, nine hundred one thousand, one hundred twenty-three".