128235607 has 4 divisors (see below), whose sum is σ = 135778896. Its totient is φ = 120692320.

The previous prime is 128235551. The next prime is 128235619. The reversal of 128235607 is 706532821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706532821 = 1019 ⋅693359.

It is a cyclic number.

It is not a de Polignac number, because 128235607 - 2¹¹ = 128233559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128235637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3771619 + ... + 3771652.

It is an arithmetic number, because the mean of its divisors is an integer number (33944724).

Almost surely, 2^128235607 is an apocalyptic number.

128235607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

128235607 is a deficient number, since it is larger than the sum of its proper divisors (7543289).

128235607 is an equidigital number, since it uses as much as digits as its factorization.

128235607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7543288.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 128235607 is about 11324.1161686023. The cubic root of 128235607 is about 504.2774452412.

The spelling of 128235607 in words is "one hundred twenty-eight million, two hundred thirty-five thousand, six hundred seven".