128957135 has 8 divisors (see below), whose sum is σ = 156344496. Its totient is φ = 102101760.

The previous prime is 128957119. The next prime is 128957167. The reversal of 128957135 is 531759821.

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

It is not a de Polignac number, because 128957135 - 2⁴ = 128957119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128957092 and 128957101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132461 + ... + 133430.

It is an arithmetic number, because the mean of its divisors is an integer number (19543062).

Almost surely, 2^128957135 is an apocalyptic number.

128957135 is a deficient number, since it is larger than the sum of its proper divisors (27387361).

128957135 is an equidigital number, since it uses as much as digits as its factorization.

128957135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265993.

The product of its digits is 75600, while the sum is 41.

The square root of 128957135 is about 11355.9295084110. The cubic root of 128957135 is about 505.2214628432.

The spelling of 128957135 in words is "one hundred twenty-eight million, nine hundred fifty-seven thousand, one hundred thirty-five".