1321030503 has 12 divisors (see below), whose sum is σ = 2054936520. Its totient is φ = 812941776.

The previous prime is 1321030483. The next prime is 1321030511. The reversal of 1321030503 is 3050301231.

1321030503 is a `hidden beast` number, since 132 + 1 + 0 + 30 + 503 = 666.

It is not a de Polignac number, because 1321030503 - 2⁶ = 1321030439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321030523) 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 11 ways as a sum of consecutive naturals, for example, 5645313 + ... + 5645546.

It is an arithmetic number, because the mean of its divisors is an integer number (171244710).

Almost surely, 2^1321030503 is an apocalyptic number.

1321030503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321030503 is a deficient number, since it is larger than the sum of its proper divisors (733906017).

1321030503 is a wasteful number, since it uses less digits than its factorization.

1321030503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11290878 (or 11290875 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 1321030503 is about 36345.9833131531. The cubic root of 1321030503 is about 1097.2466963152.

Adding to 1321030503 its reverse (3050301231), we get a palindrome (4371331734).

The spelling of 1321030503 in words is "one billion, three hundred twenty-one million, thirty thousand, five hundred three".