128819451 has 8 divisors (see below), whose sum is σ = 172428624. Its totient is φ = 85544960.

The previous prime is 128819441. The next prime is 128819473. The reversal of 128819451 is 154918821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128819451 - 2⁷ = 128819323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128819441) 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 in 7 ways as a sum of consecutive naturals, for example, 82770 + ... + 84311.

It is an arithmetic number, because the mean of its divisors is an integer number (21553578).

Almost surely, 2^128819451 is an apocalyptic number.

128819451 is a deficient number, since it is larger than the sum of its proper divisors (43609173).

128819451 is a wasteful number, since it uses less digits than its factorization.

128819451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167341.

The product of its digits is 23040, while the sum is 39.

The square root of 128819451 is about 11349.8656820246. The cubic root of 128819451 is about 505.0415951100.

The spelling of 128819451 in words is "one hundred twenty-eight million, eight hundred nineteen thousand, four hundred fifty-one".