1922218 has 4 divisors (see below), whose sum is σ = 2883330. Its totient is φ = 961108.

The previous prime is 1922213. The next prime is 1922233. The reversal of 1922218 is 8122291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1399489 + 522729 = 1183^2 + 723^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1922192 and 1922201.

It is not an unprimeable number, because it can be changed into a prime (1922213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480553 + ... + 480556.

2^1922218 is an apocalyptic number.

1922218 is a deficient number, since it is larger than the sum of its proper divisors (961112).

1922218 is an equidigital number, since it uses as much as digits as its factorization.

1922218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961111.

The product of its digits is 576, while the sum is 25.

The square root of 1922218 is about 1386.4407668559. The cubic root of 1922218 is about 124.3371418323.

The spelling of 1922218 in words is "one million, nine hundred twenty-two thousand, two hundred eighteen".