128760581 has 2 divisors, whose sum is σ = 128760582. Its totient is φ = 128760580.

The previous prime is 128760571. The next prime is 128760637. The reversal of 128760581 is 185067821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121198081 + 7562500 = 11009^2 + 2750^2 .

It is a cyclic number.

It is not a de Polignac number, because 128760581 - 2¹⁴ = 128744197 is a prime.

It is a super-2 number, since 2×128760581² = 33158574438915122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128760521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64380290 + 64380291.

It is an arithmetic number, because the mean of its divisors is an integer number (64380291).

Almost surely, 2^128760581 is an apocalyptic number.

It is an amenable number.

128760581 is a deficient number, since it is larger than the sum of its proper divisors (1).

128760581 is an equidigital number, since it uses as much as digits as its factorization.

128760581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 128760581 is about 11347.2719628993. The cubic root of 128760581 is about 504.9646493570.

The spelling of 128760581 in words is "one hundred twenty-eight million, seven hundred sixty thousand, five hundred eighty-one".