128605157 has 2 divisors, whose sum is σ = 128605158. Its totient is φ = 128605156.

The previous prime is 128605033. The next prime is 128605171. The reversal of 128605157 is 751506821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91565761 + 37039396 = 9569^2 + 6086^2 .

It is a cyclic number.

It is not a de Polignac number, because 128605157 - 2¹⁴ = 128588773 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 (128605657) 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, 64302578 + 64302579.

It is an arithmetic number, because the mean of its divisors is an integer number (64302579).

Almost surely, 2^128605157 is an apocalyptic number.

It is an amenable number.

128605157 is a deficient number, since it is larger than the sum of its proper divisors (1).

128605157 is an equidigital number, since it uses as much as digits as its factorization.

128605157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 128605157 is about 11340.4213766509. The cubic root of 128605157 is about 504.7613903967.

The spelling of 128605157 in words is "one hundred twenty-eight million, six hundred five thousand, one hundred fifty-seven".