1311331 has 8 divisors (see below), whose sum is σ = 1547264. Its totient is φ = 1087560.

The previous prime is 1311311. The next prime is 1311341. The reversal of 1311331 is 1331131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311331 - 2¹¹ = 1309283 is a prime.

It is a super-2 number, since 2×1311331² = 3439177983122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 2805 + ... + 3238.

It is an arithmetic number, because the mean of its divisors is an integer number (193408).

2^1311331 is an apocalyptic number.

1311331 is a deficient number, since it is larger than the sum of its proper divisors (235933).

1311331 is an equidigital number, since it uses as much as digits as its factorization.

1311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6081.

The product of its digits is 27, while the sum is 13.

The square root of 1311331 is about 1145.1336166579. The cubic root of 1311331 is about 109.4554630775.

Adding to 1311331 its reverse (1331131), we get a palindrome (2642462).

The spelling of 1311331 in words is "one million, three hundred eleven thousand, three hundred thirty-one".