1021063503 has 16 divisors (see below), whose sum is σ = 1443536640. Its totient is φ = 639762816.

The previous prime is 1021063489. The next prime is 1021063513. The reversal of 1021063503 is 3053601201.

It is not a de Polignac number, because 1021063503 - 2⁴ = 1021063487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021063503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021063513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23308 + ... + 50846.

It is an arithmetic number, because the mean of its divisors is an integer number (90221040).

Almost surely, 2^1021063503 is an apocalyptic number.

1021063503 is a deficient number, since it is larger than the sum of its proper divisors (422473137).

1021063503 is a wasteful number, since it uses less digits than its factorization.

1021063503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28286.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1021063503 is about 31954.0842929351. The cubic root of 1021063503 is about 1006.9724397622.

Adding to 1021063503 its reverse (3053601201), we get a palindrome (4074664704).

The spelling of 1021063503 in words is "one billion, twenty-one million, sixty-three thousand, five hundred three".