128454547 has 4 divisors (see below), whose sum is σ = 138335680. Its totient is φ = 118573416.

The previous prime is 128454509. The next prime is 128454551. The reversal of 128454547 is 745454821.

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

It is not a de Polignac number, because 128454547 - 2⁷ = 128454419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128454587) 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, 4940547 + ... + 4940572.

It is an arithmetic number, because the mean of its divisors is an integer number (34583920).

Almost surely, 2^128454547 is an apocalyptic number.

128454547 is a deficient number, since it is larger than the sum of its proper divisors (9881133).

128454547 is an equidigital number, since it uses as much as digits as its factorization.

128454547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881132.

The product of its digits is 179200, while the sum is 40.

The square root of 128454547 is about 11333.7790255501. The cubic root of 128454547 is about 504.5642707511.

The spelling of 128454547 in words is "one hundred twenty-eight million, four hundred fifty-four thousand, five hundred forty-seven".