128441231 has 4 divisors (see below), whose sum is σ = 128464200. Its totient is φ = 128418264.

The previous prime is 128441219. The next prime is 128441249. The reversal of 128441231 is 132144821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128441231 is a prime.

It is a super-2 number, since 2×128441231² = 32994299641590722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128441231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128440231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2960 + ... + 16298.

It is an arithmetic number, because the mean of its divisors is an integer number (32116050).

Almost surely, 2^128441231 is an apocalyptic number.

128441231 is a deficient number, since it is larger than the sum of its proper divisors (22969).

128441231 is an equidigital number, since it uses as much as digits as its factorization.

128441231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22968.

The product of its digits is 1536, while the sum is 26.

The square root of 128441231 is about 11333.1915628388. The cubic root of 128441231 is about 504.5468352452.

The spelling of 128441231 in words is "one hundred twenty-eight million, four hundred forty-one thousand, two hundred thirty-one".