1203563 has 4 divisors (see below), whose sum is σ = 1214328. Its totient is φ = 1192800.

The previous prime is 1203557. The next prime is 1203571. The reversal of 1203563 is 3653021.

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 1203563 - 2¹² = 1199467 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1203533) 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, 5213 + ... + 5438.

It is an arithmetic number, because the mean of its divisors is an integer number (303582).

2^1203563 is an apocalyptic number.

1203563 is a deficient number, since it is larger than the sum of its proper divisors (10765).

1203563 is a wasteful number, since it uses less digits than its factorization.

1203563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10764.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1203563 is about 1097.0701891857. The cubic root of 1203563 is about 106.3709266770.

Adding to 1203563 its reverse (3653021), we get a palindrome (4856584).

The spelling of 1203563 in words is "one million, two hundred three thousand, five hundred sixty-three".