1331311 has 8 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 1229760.

The previous prime is 1331299. The next prime is 1331327. The reversal of 1331311 is 1131331.

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 1331311 - 2⁵ = 1331279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331291 and 1331300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (179550).

2^1331311 is an apocalyptic number.

1331311 is a deficient number, since it is larger than the sum of its proper divisors (105089).

1331311 is a wasteful number, since it uses less digits than its factorization.

1331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769.

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

The square root of 1331311 is about 1153.8245100534. The cubic root of 1331311 is about 110.0085668259.

Adding to 1331311 its reverse (1131331), we get a palindrome (2462642).

It can be divided in two parts, 133 and 1311, that added together give a square (1444 = 38²).

The spelling of 1331311 in words is "one million, three hundred thirty-one thousand, three hundred eleven".