128432441 has 2 divisors, whose sum is σ = 128432442. Its totient is φ = 128432440.

The previous prime is 128432417. The next prime is 128432453. The reversal of 128432441 is 144234821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76650025 + 51782416 = 8755^2 + 7196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128432441 is a prime.

It is a Chen prime.

It is equal to p_7294142 and since 128432441 and 7294142 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (128432401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64216220 + 64216221.

It is an arithmetic number, because the mean of its divisors is an integer number (64216221).

Almost surely, 2^128432441 is an apocalyptic number.

It is an amenable number.

128432441 is a deficient number, since it is larger than the sum of its proper divisors (1).

128432441 is an equidigital number, since it uses as much as digits as its factorization.

128432441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 29.

The square root of 128432441 is about 11332.8037572350. The cubic root of 128432441 is about 504.5353252656.

The spelling of 128432441 in words is "one hundred twenty-eight million, four hundred thirty-two thousand, four hundred forty-one".