128775361 has 16 divisors (see below), whose sum is σ = 151881408. Its totient is φ = 107640000.

The previous prime is 128775349. The next prime is 128775377. The reversal of 128775361 is 163577821.

It is not a de Polignac number, because 128775361 - 2⁵ = 128775329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128775161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37986 + ... + 41236.

It is an arithmetic number, because the mean of its divisors is an integer number (9492588).

Almost surely, 2^128775361 is an apocalyptic number.

128775361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128775361 is a deficient number, since it is larger than the sum of its proper divisors (23106047).

128775361 is a wasteful number, since it uses less digits than its factorization.

128775361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552.

The product of its digits is 70560, while the sum is 40.

The square root of 128775361 is about 11347.9232020665. The cubic root of 128775361 is about 504.9839696902.

The spelling of 128775361 in words is "one hundred twenty-eight million, seven hundred seventy-five thousand, three hundred sixty-one".