128652287 has 4 divisors (see below), whose sum is σ = 135423480. Its totient is φ = 121881096.

The previous prime is 128652283. The next prime is 128652299. The reversal of 128652287 is 782256821.

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 128652287 - 2² = 128652283 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 (128652281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385568 + ... + 3385605.

It is an arithmetic number, because the mean of its divisors is an integer number (33855870).

Almost surely, 2^128652287 is an apocalyptic number.

128652287 is a deficient number, since it is larger than the sum of its proper divisors (6771193).

128652287 is an equidigital number, since it uses as much as digits as its factorization.

128652287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771192.

The product of its digits is 107520, while the sum is 41.

The square root of 128652287 is about 11342.4991514216. The cubic root of 128652287 is about 504.8230429241.

The spelling of 128652287 in words is "one hundred twenty-eight million, six hundred fifty-two thousand, two hundred eighty-seven".