128760641 has 2 divisors, whose sum is σ = 128760642. Its totient is φ = 128760640.

The previous prime is 128760637. The next prime is 128760649. The reversal of 128760641 is 146067821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93702400 + 35058241 = 9680^2 + 5921^2 .

It is a cyclic number.

It is not a de Polignac number, because 128760641 - 2² = 128760637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (128760649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64380320 + 64380321.

It is an arithmetic number, because the mean of its divisors is an integer number (64380321).

Almost surely, 2^128760641 is an apocalyptic number.

It is an amenable number.

128760641 is a deficient number, since it is larger than the sum of its proper divisors (1).

128760641 is an equidigital number, since it uses as much as digits as its factorization.

128760641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 128760641 is about 11347.2746067062. The cubic root of 128760641 is about 504.9647277916.

The spelling of 128760641 in words is "one hundred twenty-eight million, seven hundred sixty thousand, six hundred forty-one".