128941565 has 8 divisors (see below), whose sum is σ = 161457408. Its totient is φ = 98668240.

The previous prime is 128941541. The next prime is 128941573. The reversal of 128941565 is 565149821.

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

It is not a de Polignac number, because 128941565 - 2¹⁰ = 128940541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560501 + ... + 560730.

It is an arithmetic number, because the mean of its divisors is an integer number (20182176).

Almost surely, 2^128941565 is an apocalyptic number.

It is an amenable number.

128941565 is a deficient number, since it is larger than the sum of its proper divisors (32515843).

128941565 is a wasteful number, since it uses less digits than its factorization.

128941565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121259.

The product of its digits is 86400, while the sum is 41.

The square root of 128941565 is about 11355.2439427782. The cubic root of 128941565 is about 505.2011289165.

The spelling of 128941565 in words is "one hundred twenty-eight million, nine hundred forty-one thousand, five hundred sixty-five".