260128511 has 2 divisors, whose sum is σ = 260128512. Its totient is φ = 260128510.

The previous prime is 260128501. The next prime is 260128541. The reversal of 260128511 is 115821062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260128511 - 2⁶ = 260128447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260128501) 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 as a sum of consecutive naturals, namely, 130064255 + 130064256.

It is an arithmetic number, because the mean of its divisors is an integer number (130064256).

Almost surely, 2^260128511 is an apocalyptic number.

260128511 is a deficient number, since it is larger than the sum of its proper divisors (1).

260128511 is an equidigital number, since it uses as much as digits as its factorization.

260128511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 260128511 is about 16128.4999612487. The cubic root of 260128511 is about 638.3555692333.

Adding to 260128511 its reverse (115821062), we get a palindrome (375949573).

The spelling of 260128511 in words is "two hundred sixty million, one hundred twenty-eight thousand, five hundred eleven".