128571857 has 2 divisors, whose sum is σ = 128571858. Its totient is φ = 128571856.

The previous prime is 128571827. The next prime is 128571869. The reversal of 128571857 is 758175821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105493441 + 23078416 = 10271^2 + 4804^2 .

It is a cyclic number.

It is not a de Polignac number, because 128571857 - 2²⁶ = 61462993 is a prime.

It is not a weakly prime, because it can be changed into another prime (128571827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64285928 + 64285929.

It is an arithmetic number, because the mean of its divisors is an integer number (64285929).

Almost surely, 2^128571857 is an apocalyptic number.

It is an amenable number.

128571857 is a deficient number, since it is larger than the sum of its proper divisors (1).

128571857 is an equidigital number, since it uses as much as digits as its factorization.

128571857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 44.

The square root of 128571857 is about 11338.9530821853. The cubic root of 128571857 is about 504.7178203314.

The spelling of 128571857 in words is "one hundred twenty-eight million, five hundred seventy-one thousand, eight hundred fifty-seven".