128454479 has 4 divisors (see below), whose sum is σ = 129063480. Its totient is φ = 127845480.

The previous prime is 128454461. The next prime is 128454503. The reversal of 128454479 is 974454821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128454479 - 2²⁴ = 111677263 is a prime.

It is a super-2 number, since 2×128454479² = 33001106350322882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128454409) 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, 304184 + ... + 304605.

It is an arithmetic number, because the mean of its divisors is an integer number (32265870).

Almost surely, 2^128454479 is an apocalyptic number.

128454479 is a deficient number, since it is larger than the sum of its proper divisors (609001).

128454479 is an equidigital number, since it uses as much as digits as its factorization.

128454479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609000.

The product of its digits is 322560, while the sum is 44.

The square root of 128454479 is about 11333.7760256677. The cubic root of 128454479 is about 504.5641817173.

The spelling of 128454479 in words is "one hundred twenty-eight million, four hundred fifty-four thousand, four hundred seventy-nine".