128137057 has 2 divisors, whose sum is σ = 128137058. Its totient is φ = 128137056.

The previous prime is 128136997. The next prime is 128137067. The reversal of 128137057 is 750731821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127260961 + 876096 = 11281^2 + 936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128137057 is a prime.

It is not a weakly prime, because it can be changed into another prime (128137067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64068528 + 64068529.

It is an arithmetic number, because the mean of its divisors is an integer number (64068529).

Almost surely, 2^128137057 is an apocalyptic number.

It is an amenable number.

128137057 is a deficient number, since it is larger than the sum of its proper divisors (1).

128137057 is an equidigital number, since it uses as much as digits as its factorization.

128137057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 128137057 is about 11319.7639993067. The cubic root of 128137057 is about 504.1482318359.

Adding to 128137057 its reverse (750731821), we get a palindrome (878868878).

The spelling of 128137057 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, fifty-seven".