1103563 has 4 divisors (see below), whose sum is σ = 1151568. Its totient is φ = 1055560.

The previous prime is 1103561. The next prime is 1103579. The reversal of 1103563 is 3653011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3653011 = 17 ⋅214883.

It is a cyclic number.

It is not a de Polignac number, because 1103563 - 2¹ = 1103561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1103563.

It is not an unprimeable number, because it can be changed into a prime (1103561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23968 + ... + 24013.

It is an arithmetic number, because the mean of its divisors is an integer number (287892).

2^1103563 is an apocalyptic number.

1103563 is a deficient number, since it is larger than the sum of its proper divisors (48005).

1103563 is an equidigital number, since it uses as much as digits as its factorization.

1103563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48004.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1103563 is about 1050.5060685213. The cubic root of 1103563 is about 103.3393463954.

Adding to 1103563 its reverse (3653011), we get a palindrome (4756574).

The spelling of 1103563 in words is "one million, one hundred three thousand, five hundred sixty-three".