128473571 has 4 divisors (see below), whose sum is σ = 129292032. Its totient is φ = 127655112.

The previous prime is 128473559. The next prime is 128473589. The reversal of 128473571 is 175374821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175374821 = 7069 ⋅24809.

It is a cyclic number.

It is not a de Polignac number, because 128473571 - 2²⁶ = 61364707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128473511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408995 + ... + 409308.

It is an arithmetic number, because the mean of its divisors is an integer number (32323008).

Almost surely, 2^128473571 is an apocalyptic number.

128473571 is a deficient number, since it is larger than the sum of its proper divisors (818461).

128473571 is an equidigital number, since it uses as much as digits as its factorization.

128473571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818460.

The product of its digits is 47040, while the sum is 38.

The square root of 128473571 is about 11334.6182555920. The cubic root of 128473571 is about 504.5891780226.

The spelling of 128473571 in words is "one hundred twenty-eight million, four hundred seventy-three thousand, five hundred seventy-one".