1115563 has 4 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 1107928.

The previous prime is 1115561. The next prime is 1115567. The reversal of 1115563 is 3655111.

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

It is a cyclic number.

It is not a de Polignac number, because 1115563 - 2¹ = 1115561 is a prime.

It is a Duffinian number.

1115563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1115561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3595 + ... + 3892.

It is an arithmetic number, because the mean of its divisors is an integer number (280800).

2^1115563 is an apocalyptic number.

1115563 is a deficient number, since it is larger than the sum of its proper divisors (7637).

1115563 is an equidigital number, since it uses as much as digits as its factorization.

1115563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7636.

The product of its digits is 450, while the sum is 22.

The square root of 1115563 is about 1056.2021586799. The cubic root of 1115563 is about 103.7125630643.

The spelling of 1115563 in words is "one million, one hundred fifteen thousand, five hundred sixty-three".