128257571 has 32 divisors (see below), whose sum is σ = 153312768. Its totient is φ = 106168320.

The previous prime is 128257567. The next prime is 128257601. The reversal of 128257571 is 175752821.

It is a cyclic number.

It is not a de Polignac number, because 128257571 - 2² = 128257567 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128257531) 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 in 31 ways as a sum of consecutive naturals, for example, 664451 + ... + 664643.

It is an arithmetic number, because the mean of its divisors is an integer number (4791024).

Almost surely, 2^128257571 is an apocalyptic number.

128257571 is a deficient number, since it is larger than the sum of its proper divisors (25055197).

128257571 is a wasteful number, since it uses less digits than its factorization.

128257571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its digits is 39200, while the sum is 38.

The square root of 128257571 is about 11325.0859157889. The cubic root of 128257571 is about 504.3062342226.

The spelling of 128257571 in words is "one hundred twenty-eight million, two hundred fifty-seven thousand, five hundred seventy-one".