128042133 has 4 divisors (see below), whose sum is σ = 170722848. Its totient is φ = 85361420.

The previous prime is 128042129. The next prime is 128042137. The reversal of 128042133 is 331240821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331240821 = 3 ⋅110413607.

It is an interprime number because it is at equal distance from previous prime (128042129) and next prime (128042137).

It is a cyclic number.

It is not a de Polignac number, because 128042133 - 2² = 128042129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128042137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21340353 + ... + 21340358.

It is an arithmetic number, because the mean of its divisors is an integer number (42680712).

Almost surely, 2^128042133 is an apocalyptic number.

It is an amenable number.

128042133 is a deficient number, since it is larger than the sum of its proper divisors (42680715).

128042133 is an equidigital number, since it uses as much as digits as its factorization.

128042133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42680714.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 128042133 is about 11315.5703789071. The cubic root of 128042133 is about 504.0237099894.

Adding to 128042133 its reverse (331240821), we get a palindrome (459282954).

The spelling of 128042133 in words is "one hundred twenty-eight million, forty-two thousand, one hundred thirty-three".