1000605565 has 4 divisors (see below), whose sum is σ = 1200726684. Its totient is φ = 800484448.

The previous prime is 1000605553. The next prime is 1000605583. The reversal of 1000605565 is 5655060001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 325333369 + 675272196 = 18037^2 + 25986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000605565 - 2²³ = 992216957 is a prime.

It is a super-2 number, since 2×1000605565² = 2002422993417938450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 100060552 + ... + 100060561.

It is an arithmetic number, because the mean of its divisors is an integer number (300181671).

Almost surely, 2^1000605565 is an apocalyptic number.

It is an amenable number.

1000605565 is a deficient number, since it is larger than the sum of its proper divisors (200121119).

1000605565 is an equidigital number, since it uses as much as digits as its factorization.

1000605565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200121118.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1000605565 is about 31632.3499759344. The cubic root of 1000605565 is about 1000.2018142683.

Adding to 1000605565 its reverse (5655060001), we get a palindrome (6655665566).

It can be divided in two parts, 100060 and 5565, that added together give a square (105625 = 325²).

The spelling of 1000605565 in words is "one billion, six hundred five thousand, five hundred sixty-five".