128434841 has 2 divisors, whose sum is σ = 128434842. Its totient is φ = 128434840.

The previous prime is 128434819. The next prime is 128434853. The reversal of 128434841 is 148434821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 5779216 = 11075^2 + 2404^2 .

It is a cyclic number.

It is not a de Polignac number, because 128434841 - 2¹⁸ = 128172697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128434861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64217420 + 64217421.

It is an arithmetic number, because the mean of its divisors is an integer number (64217421).

Almost surely, 2^128434841 is an apocalyptic number.

It is an amenable number.

128434841 is a deficient number, since it is larger than the sum of its proper divisors (1).

128434841 is an equidigital number, since it uses as much as digits as its factorization.

128434841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 35.

The square root of 128434841 is about 11332.9096440411. The cubic root of 128434841 is about 504.5384679743.

The spelling of 128434841 in words is "one hundred twenty-eight million, four hundred thirty-four thousand, eight hundred forty-one".