1422418 has 4 divisors (see below), whose sum is σ = 2133630. Its totient is φ = 711208.

The previous prime is 1422409. The next prime is 1422419. The reversal of 1422418 is 8142241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8142241 = 19 ⋅428539.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 388129 = 1017^2 + 623^2 .

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 not an unprimeable number, because it can be changed into a prime (1422419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355603 + ... + 355606.

2^1422418 is an apocalyptic number.

1422418 is a deficient number, since it is larger than the sum of its proper divisors (711212).

1422418 is an equidigital number, since it uses as much as digits as its factorization.

1422418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711211.

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

The square root of 1422418 is about 1192.6516675040. The cubic root of 1422418 is about 112.4628486380.

Adding to 1422418 its reverse (8142241), we get a palindrome (9564659).

The spelling of 1422418 in words is "one million, four hundred twenty-two thousand, four hundred eighteen".