128199571 has 2 divisors, whose sum is σ = 128199572. Its totient is φ = 128199570.

The previous prime is 128199557. The next prime is 128199583. The reversal of 128199571 is 175991821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128199571 - 2¹¹ = 128197523 is a prime.

It is not a weakly prime, because it can be changed into another prime (128199521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64099785 + 64099786.

It is an arithmetic number, because the mean of its divisors is an integer number (64099786).

Almost surely, 2^128199571 is an apocalyptic number.

128199571 is a deficient number, since it is larger than the sum of its proper divisors (1).

128199571 is an equidigital number, since it uses as much as digits as its factorization.

128199571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 43.

The square root of 128199571 is about 11322.5249392527. The cubic root of 128199571 is about 504.2302044763.

The spelling of 128199571 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, five hundred seventy-one".