1331303 has 6 divisors (see below), whose sum is σ = 1379664. Its totient is φ = 1284584.

The previous prime is 1331299. The next prime is 1331327. The reversal of 1331303 is 3031331.

It is not a de Polignac number, because 1331303 - 2² = 1331299 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 (1331333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50 + ... + 1632.

It is an arithmetic number, because the mean of its divisors is an integer number (229944).

2^1331303 is an apocalyptic number.

1331303 is a deficient number, since it is larger than the sum of its proper divisors (48361).

1331303 is an equidigital number, since it uses as much as digits as its factorization.

1331303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1612 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 14.

The square root of 1331303 is about 1153.8210433165. The cubic root of 1331303 is about 110.0083464741.

Adding to 1331303 its reverse (3031331), we get a palindrome (4362634).

The spelling of 1331303 in words is "one million, three hundred thirty-one thousand, three hundred three".