128139124 has 12 divisors (see below), whose sum is σ = 224390404. Its totient is φ = 64027584.

The previous prime is 128139113. The next prime is 128139157. The reversal of 128139124 is 421931821.

It can be written as a sum of positive squares in 2 ways, for example, as 86304100 + 41835024 = 9290^2 + 6468^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3039 + ... + 16294.

Almost surely, 2^128139124 is an apocalyptic number.

It is an amenable number.

128139124 is a deficient number, since it is larger than the sum of its proper divisors (96251280).

128139124 is a wasteful number, since it uses less digits than its factorization.

128139124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20994 (or 20992 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 128139124 is about 11319.8552994285. The cubic root of 128139124 is about 504.1509426540.

The spelling of 128139124 in words is "one hundred twenty-eight million, one hundred thirty-nine thousand, one hundred twenty-four".