128751287 has 16 divisors (see below), whose sum is σ = 150039552. Its totient is φ = 108203040.

The previous prime is 128751247. The next prime is 128751313. The reversal of 128751287 is 782157821.

It is a cyclic number.

It is not a de Polignac number, because 128751287 - 2⁸ = 128751031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128751247) 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 15 ways as a sum of consecutive naturals, for example, 126593 + ... + 127605.

It is an arithmetic number, because the mean of its divisors is an integer number (9377472).

Almost surely, 2^128751287 is an apocalyptic number.

128751287 is a deficient number, since it is larger than the sum of its proper divisors (21288265).

128751287 is a wasteful number, since it uses less digits than its factorization.

128751287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358.

The product of its digits is 62720, while the sum is 41.

The square root of 128751287 is about 11346.8624297645. The cubic root of 128751287 is about 504.9524995351.

The spelling of 128751287 in words is "one hundred twenty-eight million, seven hundred fifty-one thousand, two hundred eighty-seven".