128531039 has 8 divisors (see below), whose sum is σ = 158192160. Its totient is φ = 101694816.

The previous prime is 128530981. The next prime is 128531057. The reversal of 128531039 is 930135821.

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

It is a cyclic number.

It is not a de Polignac number, because 128531039 - 2¹² = 128526943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128530996 and 128531014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128531069) 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, 706124 + ... + 706305.

It is an arithmetic number, because the mean of its divisors is an integer number (19774020).

Almost surely, 2^128531039 is an apocalyptic number.

128531039 is a deficient number, since it is larger than the sum of its proper divisors (29661121).

128531039 is a wasteful number, since it uses less digits than its factorization.

128531039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412449.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 128531039 is about 11337.1530376898. The cubic root of 128531039 is about 504.6644033732.

The spelling of 128531039 in words is "one hundred twenty-eight million, five hundred thirty-one thousand, thirty-nine".