1442218 has 4 divisors (see below), whose sum is σ = 2163330. Its totient is φ = 721108.

The previous prime is 1442209. The next prime is 1442227. The reversal of 1442218 is 8122441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8122441 = 151 ⋅53791.

It is an interprime number because it is at equal distance from previous prime (1442209) and next prime (1442227).

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 9409 = 1197^2 + 97^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360553 + ... + 360556.

2^1442218 is an apocalyptic number.

1442218 is a deficient number, since it is larger than the sum of its proper divisors (721112).

1442218 is an equidigital number, since it uses as much as digits as its factorization.

1442218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721111.

The product of its digits is 512, while the sum is 22.

The square root of 1442218 is about 1200.9238110721. The cubic root of 1442218 is about 112.9822719990.

Adding to 1442218 its reverse (8122441), we get a palindrome (9564659).

The spelling of 1442218 in words is "one million, four hundred forty-two thousand, two hundred eighteen".