1005565 has 16 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 713920.

The previous prime is 1005553. The next prime is 1005581. The reversal of 1005565 is 5655001.

It is not a de Polignac number, because 1005565 - 2⁷ = 1005437 is a prime.

It is a super-2 number, since 2×1005565² = 2022321938450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2391 + ... + 2779.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2^1005565 is an apocalyptic number.

It is an amenable number.

1005565 is a deficient number, since it is larger than the sum of its proper divisors (342275).

1005565 is a wasteful number, since it uses less digits than its factorization.

1005565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 1005565 is about 1002.7786395810. The cubic root of 1005565 is about 100.1851569574.

It can be divided in two parts, 100 and 5565, that added together give a palindrome (5665).

The spelling of 1005565 in words is "one million, five thousand, five hundred sixty-five".