1012005503 has 2 divisors, whose sum is σ = 1012005504. Its totient is φ = 1012005502.

The previous prime is 1012005499. The next prime is 1012005521. The reversal of 1012005503 is 3055002101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012005503 - 2² = 1012005499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012005403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506002751 + 506002752.

It is an arithmetic number, because the mean of its divisors is an integer number (506002752).

Almost surely, 2^1012005503 is an apocalyptic number.

1012005503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012005503 is an equidigital number, since it uses as much as digits as its factorization.

1012005503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1012005503 is about 31812.0339337176. The cubic root of 1012005503 is about 1003.9859256213.

Adding to 1012005503 its reverse (3055002101), we get a palindrome (4067007604).

The spelling of 1012005503 in words is "one billion, twelve million, five thousand, five hundred three".