128458471 has 2 divisors, whose sum is σ = 128458472. Its totient is φ = 128458470.

The previous prime is 128458439. The next prime is 128458489. The reversal of 128458471 is 174854821.

It is a strong prime.

It is an emirp because it is prime and its reverse (174854821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128458471 - 2⁵ = 128458439 is a prime.

It is a super-3 number, since 3×128458471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128458271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64229235 + 64229236.

It is an arithmetic number, because the mean of its divisors is an integer number (64229236).

Almost surely, 2^128458471 is an apocalyptic number.

128458471 is a deficient number, since it is larger than the sum of its proper divisors (1).

128458471 is an equidigital number, since it uses as much as digits as its factorization.

128458471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 40.

The square root of 128458471 is about 11333.9521350674. The cubic root of 128458471 is about 504.5694084699.

It can be divided in two parts, 12845 and 8471, that added together give a square (21316 = 146²).

The spelling of 128458471 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, four hundred seventy-one".