1322218 has 4 divisors (see below), whose sum is σ = 1983330. Its totient is φ = 661108.

The previous prime is 1322203. The next prime is 1322219. The reversal of 1322218 is 8122231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8122231 = 13 ⋅624787.

It can be written as a sum of positive squares in only one way, i.e., 1247689 + 74529 = 1117^2 + 273^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1322195 and 1322204.

It is not an unprimeable number, because it can be changed into a prime (1322219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330553 + ... + 330556.

2^1322218 is an apocalyptic number.

1322218 is a deficient number, since it is larger than the sum of its proper divisors (661112).

1322218 is an equidigital number, since it uses as much as digits as its factorization.

1322218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661111.

The product of its digits is 192, while the sum is 19.

The square root of 1322218 is about 1149.8773847676. The cubic root of 1322218 is about 109.7575375814.

Adding to 1322218 its reverse (8122231), we get a palindrome (9444449).

It can be divided in two parts, 1322 and 218, that added together give a triangular number (1540 = T₅₅).

The spelling of 1322218 in words is "one million, three hundred twenty-two thousand, two hundred eighteen".