128266157 has 2 divisors, whose sum is σ = 128266158. Its totient is φ = 128266156.

The previous prime is 128266129. The next prime is 128266199. The reversal of 128266157 is 751662821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116079076 + 12187081 = 10774^2 + 3491^2 .

It is a cyclic number.

It is not a de Polignac number, because 128266157 - 2¹⁰ = 128265133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128266157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128266657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64133078 + 64133079.

It is an arithmetic number, because the mean of its divisors is an integer number (64133079).

Almost surely, 2^128266157 is an apocalyptic number.

It is an amenable number.

128266157 is a deficient number, since it is larger than the sum of its proper divisors (1).

128266157 is an equidigital number, since it uses as much as digits as its factorization.

128266157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 128266157 is about 11325.4649794170. The cubic root of 128266157 is about 504.3174872989.

The spelling of 128266157 in words is "one hundred twenty-eight million, two hundred sixty-six thousand, one hundred fifty-seven".