1218822 has 32 divisors (see below), whose sum is σ = 2712960. Its totient is φ = 361920.

The previous prime is 1218821. The next prime is 1218829. The reversal of 1218822 is 2288121.

It is a junction number, because it is equal to n+sod(n) for n = 1218792 and 1218801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3738 + ... + 4050.

It is an arithmetic number, because the mean of its divisors is an integer number (84780).

2^1218822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356480).

1218822 is an abundant number, since it is smaller than the sum of its proper divisors (1494138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218822 is a wasteful number, since it uses less digits than its factorization.

1218822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388.

The product of its digits is 512, while the sum is 24.

The square root of 1218822 is about 1104.0027173880. The cubic root of 1218822 is about 106.8185704638.

The spelling of 1218822 in words is "one million, two hundred eighteen thousand, eight hundred twenty-two".