1266530503 has 4 divisors (see below), whose sum is σ = 1447463440. Its totient is φ = 1085597568.

The previous prime is 1266530501. The next prime is 1266530527. The reversal of 1266530503 is 3050356621.

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 1266530503 - 2¹ = 1266530501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266530501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90466458 + ... + 90466471.

It is an arithmetic number, because the mean of its divisors is an integer number (361865860).

Almost surely, 2^1266530503 is an apocalyptic number.

1266530503 is a deficient number, since it is larger than the sum of its proper divisors (180932937).

1266530503 is an equidigital number, since it uses as much as digits as its factorization.

1266530503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180932936.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 1266530503 is about 35588.3478543188. The cubic root of 1266530503 is about 1081.9450838999.

The spelling of 1266530503 in words is "one billion, two hundred sixty-six million, five hundred thirty thousand, five hundred three".