1311245303 has 4 divisors (see below), whose sum is σ = 1323500040. Its totient is φ = 1298990568.

The previous prime is 1311245291. The next prime is 1311245357. The reversal of 1311245303 is 3035421131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3035421131 = 67 ⋅45304793.

It is a cyclic number.

It is not a de Polignac number, because 1311245303 - 2¹² = 1311241207 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 (1311241303) 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, 6127208 + ... + 6127421.

It is an arithmetic number, because the mean of its divisors is an integer number (330875010).

Almost surely, 2^1311245303 is an apocalyptic number.

1311245303 is a deficient number, since it is larger than the sum of its proper divisors (12254737).

1311245303 is a wasteful number, since it uses less digits than its factorization.

1311245303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12254736.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1311245303 is about 36211.1212612921. The cubic root of 1311245303 is about 1094.5307867849.

Adding to 1311245303 its reverse (3035421131), we get a palindrome (4346666434).

The spelling of 1311245303 in words is "one billion, three hundred eleven million, two hundred forty-five thousand, three hundred three".