128020605 has 8 divisors (see below), whose sum is σ = 204832992. Its totient is φ = 68277648.

The previous prime is 128020603. The next prime is 128020637. The reversal of 128020605 is 506020821.

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

It is not a de Polignac number, because 128020605 - 2¹ = 128020603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128020603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4267339 + ... + 4267368.

It is an arithmetic number, because the mean of its divisors is an integer number (25604124).

Almost surely, 2^128020605 is an apocalyptic number.

128020605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128020605 is a deficient number, since it is larger than the sum of its proper divisors (76812387).

128020605 is an equidigital number, since it uses as much as digits as its factorization.

128020605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8534715.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 128020605 is about 11314.6190832922. The cubic root of 128020605 is about 503.9954608750.

The spelling of 128020605 in words is "one hundred twenty-eight million, twenty thousand, six hundred five".