128886081 has 4 divisors (see below), whose sum is σ = 171848112. Its totient is φ = 85924052.

The previous prime is 128886019. The next prime is 128886097. The reversal of 128886081 is 180688821.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128886081 is a prime.

It is a super-2 number, since 2×128886081² = 33223243751077122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128886581) 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, 21481011 + ... + 21481016.

It is an arithmetic number, because the mean of its divisors is an integer number (42962028).

Almost surely, 2^128886081 is an apocalyptic number.

It is an amenable number.

128886081 is a deficient number, since it is larger than the sum of its proper divisors (42962031).

128886081 is an equidigital number, since it uses as much as digits as its factorization.

128886081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42962030.

The product of its (nonzero) digits is 49152, while the sum is 42.

The square root of 128886081 is about 11352.8005795927. The cubic root of 128886081 is about 505.1286552578.

The spelling of 128886081 in words is "one hundred twenty-eight million, eight hundred eighty-six thousand, eighty-one".