128752471 has 2 divisors, whose sum is σ = 128752472. Its totient is φ = 128752470.

The previous prime is 128752457. The next prime is 128752487. The reversal of 128752471 is 174257821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128752471 is a prime.

It is a super-3 number, since 3×128752471³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128752471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128752451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64376235 + 64376236.

It is an arithmetic number, because the mean of its divisors is an integer number (64376236).

Almost surely, 2^128752471 is an apocalyptic number.

128752471 is a deficient number, since it is larger than the sum of its proper divisors (1).

128752471 is an equidigital number, since it uses as much as digits as its factorization.

128752471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31360, while the sum is 37.

The square root of 128752471 is about 11346.9146026574. The cubic root of 128752471 is about 504.9540473822.

The spelling of 128752471 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, four hundred seventy-one".