1311303 has 16 divisors (see below), whose sum is σ = 2048256. Its totient is φ = 730560.

The previous prime is 1311301. The next prime is 1311307. The reversal of 1311303 is 3031131.

It is not a de Polignac number, because 1311303 - 2¹ = 1311301 is a prime.

1311303 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100 + ... + 1622.

It is an arithmetic number, because the mean of its divisors is an integer number (128016).

2^1311303 is an apocalyptic number.

1311303 is a deficient number, since it is larger than the sum of its proper divisors (736953).

1311303 is a wasteful number, since it uses less digits than its factorization.

1311303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 1311303 is about 1145.1213909451. The cubic root of 1311303 is about 109.4546840282.

Adding to 1311303 its reverse (3031131), we get a palindrome (4342434).

The spelling of 1311303 in words is "one million, three hundred eleven thousand, three hundred three".