1331318 has 4 divisors (see below), whose sum is σ = 1996980. Its totient is φ = 665658.

The previous prime is 1331299. The next prime is 1331327. The reversal of 1331318 is 8131331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1331318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332828 + ... + 332831.

It is an arithmetic number, because the mean of its divisors is an integer number (499245).

2^1331318 is an apocalyptic number.

1331318 is a deficient number, since it is larger than the sum of its proper divisors (665662).

1331318 is an equidigital number, since it uses as much as digits as its factorization.

1331318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665661.

The product of its digits is 216, while the sum is 20.

The square root of 1331318 is about 1153.8275434397. The cubic root of 1331318 is about 110.0087596330.

Adding to 1331318 its reverse (8131331), we get a palindrome (9462649).

It can be divided in two parts, 13313 and 18, that added together give a palindrome (13331).

The spelling of 1331318 in words is "one million, three hundred thirty-one thousand, three hundred eighteen".