128283565 has 8 divisors (see below), whose sum is σ = 154033560. Its totient is φ = 102564672.

The previous prime is 128283563. The next prime is 128283587. The reversal of 128283565 is 565382821.

It can be written as a sum of positive squares in 4 ways, for example, as 31516996 + 96766569 = 5614^2 + 9837^2 .

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 128283565 - 2¹ = 128283563 is a prime.

It is a super-3 number, since 3×128283565³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128283563) 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 7 ways as a sum of consecutive naturals, for example, 2551 + ... + 16219.

It is an arithmetic number, because the mean of its divisors is an integer number (19254195).

Almost surely, 2^128283565 is an apocalyptic number.

It is an amenable number.

128283565 is a deficient number, since it is larger than the sum of its proper divisors (25749995).

128283565 is a wasteful number, since it uses less digits than its factorization.

128283565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15551.

The product of its digits is 115200, while the sum is 40.

The square root of 128283565 is about 11326.2334869099. The cubic root of 128283565 is about 504.3403012193.

The spelling of 128283565 in words is "one hundred twenty-eight million, two hundred eighty-three thousand, five hundred sixty-five".