1005564 has 24 divisors (see below), whose sum is σ = 2681728. Its totient is φ = 287280.

The previous prime is 1005553. The next prime is 1005581. The reversal of 1005564 is 4655001.

It is a happy number.

It is a super-2 number, since 2×1005564² = 2022317916192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1005564.

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, 5902 + ... + 6069.

2^1005564 is an apocalyptic number.

1005564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1005564 is an abundant number, since it is smaller than the sum of its proper divisors (1676164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005564 is a wasteful number, since it uses less digits than its factorization.

1005564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11985 (or 11983 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1005564 is about 1002.7781409664. The cubic root of 1005564 is about 100.1851237472.

The spelling of 1005564 in words is "one million, five thousand, five hundred sixty-four".