1311218 has 8 divisors (see below), whose sum is σ = 1971840. Its totient is φ = 653940.

The previous prime is 1311217. The next prime is 1311223. The reversal of 1311218 is 8121131.

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

It is a junction number, because it is equal to n+sod(n) for n = 1311196 and 1311205.

It is not an unprimeable number, because it can be changed into a prime (1311217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (246480).

2^1311218 is an apocalyptic number.

1311218 is a deficient number, since it is larger than the sum of its proper divisors (660622).

1311218 is a wasteful number, since it uses less digits than its factorization.

1311218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its digits is 48, while the sum is 17.

The square root of 1311218 is about 1145.0842763745. The cubic root of 1311218 is about 109.4523189889.

Adding to 1311218 its reverse (8121131), we get a palindrome (9432349).

The spelling of 1311218 in words is "one million, three hundred eleven thousand, two hundred eighteen".