128127157 has 2 divisors, whose sum is σ = 128127158. Its totient is φ = 128127156.

The previous prime is 128127151. The next prime is 128127163. The reversal of 128127157 is 751721821.

It is a balanced prime because it is at equal distance from previous prime (128127151) and next prime (128127163).

It can be written as a sum of positive squares in only one way, i.e., 128119761 + 7396 = 11319^2 + 86^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128127157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128127151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64063578 + 64063579.

It is an arithmetic number, because the mean of its divisors is an integer number (64063579).

Almost surely, 2^128127157 is an apocalyptic number.

It is an amenable number.

128127157 is a deficient number, since it is larger than the sum of its proper divisors (1).

128127157 is an equidigital number, since it uses as much as digits as its factorization.

128127157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 34.

The square root of 128127157 is about 11319.3267025915. The cubic root of 128127157 is about 504.1352478322.

Adding to 128127157 its reverse (751721821), we get a palindrome (879848978).

The spelling of 128127157 in words is "one hundred twenty-eight million, one hundred twenty-seven thousand, one hundred fifty-seven".