1020563503 has 4 divisors (see below), whose sum is σ = 1026462888. Its totient is φ = 1014664120.

The previous prime is 1020563459. The next prime is 1020563561. The reversal of 1020563503 is 3053650201.

It is a happy number.

1020563503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020563503 is a prime.

It is a super-3 number, since 3×1020563503³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020563303) 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, 2949433 + ... + 2949778.

It is an arithmetic number, because the mean of its divisors is an integer number (256615722).

Almost surely, 2^1020563503 is an apocalyptic number.

1020563503 is a deficient number, since it is larger than the sum of its proper divisors (5899385).

1020563503 is an equidigital number, since it uses as much as digits as its factorization.

1020563503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899384.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1020563503 is about 31946.2596089120. The cubic root of 1020563503 is about 1006.8080463221.

The spelling of 1020563503 in words is "one billion, twenty million, five hundred sixty-three thousand, five hundred three".