128273457 has 16 divisors (see below), whose sum is σ = 184887360. Its totient is φ = 78637632.

The previous prime is 128273417. The next prime is 128273459. The reversal of 128273457 is 754372821.

It is not a de Polignac number, because 128273457 - 2⁶ = 128273393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (128273459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4378 + ... + 16604.

It is an arithmetic number, because the mean of its divisors is an integer number (11555460).

Almost surely, 2^128273457 is an apocalyptic number.

It is an amenable number.

128273457 is a deficient number, since it is larger than the sum of its proper divisors (56613903).

128273457 is a wasteful number, since it uses less digits than its factorization.

128273457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12512.

The product of its digits is 94080, while the sum is 39.

The square root of 128273457 is about 11325.7872574051. The cubic root of 128273457 is about 504.3270545090.

The spelling of 128273457 in words is "one hundred twenty-eight million, two hundred seventy-three thousand, four hundred fifty-seven".