128266757 has 2 divisors, whose sum is σ = 128266758. Its totient is φ = 128266756.

The previous prime is 128266741. The next prime is 128266763. The reversal of 128266757 is 757662821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111218116 + 17048641 = 10546^2 + 4129^2 .

It is a cyclic number.

It is not a de Polignac number, because 128266757 - 2⁴ = 128266741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128266157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64133378 + 64133379.

It is an arithmetic number, because the mean of its divisors is an integer number (64133379).

Almost surely, 2^128266757 is an apocalyptic number.

It is an amenable number.

128266757 is a deficient number, since it is larger than the sum of its proper divisors (1).

128266757 is an equidigital number, since it uses as much as digits as its factorization.

128266757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 128266757 is about 11325.4914683646. The cubic root of 128266757 is about 504.3182736586.

The spelling of 128266757 in words is "one hundred twenty-eight million, two hundred sixty-six thousand, seven hundred fifty-seven".