128098565 has 8 divisors (see below), whose sum is σ = 175678080. Its totient is φ = 87838992.

The previous prime is 128098549. The next prime is 128098571. The reversal of 128098565 is 565890821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128098565 - 2⁴ = 128098549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829945 + ... + 1830014.

It is an arithmetic number, because the mean of its divisors is an integer number (21959760).

Almost surely, 2^128098565 is an apocalyptic number.

It is an amenable number.

128098565 is a deficient number, since it is larger than the sum of its proper divisors (47579515).

128098565 is an equidigital number, since it uses as much as digits as its factorization.

128098565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659971.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 128098565 is about 11318.0636594782. The cubic root of 128098565 is about 504.0977452250.

The spelling of 128098565 in words is "one hundred twenty-eight million, ninety-eight thousand, five hundred sixty-five".