1782226 has 8 divisors (see below), whose sum is σ = 2680524. Its totient is φ = 888720.

The previous prime is 1782211. The next prime is 1782239. The reversal of 1782226 is 6222871.

It is a Cunningham number, because it is equal to 1335²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1782225 + 1 = 1335^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1782194 and 1782203.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 45 + ... + 1888.

2^1782226 is an apocalyptic number.

1782226 is a deficient number, since it is larger than the sum of its proper divisors (898298).

1782226 is a wasteful number, since it uses less digits than its factorization.

1782226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396.

The product of its digits is 2688, while the sum is 28.

The square root of 1782226 is about 1335.0003745318. Note that the first 3 decimals coincide. The cubic root of 1782226 is about 121.2423256559.

The spelling of 1782226 in words is "one million, seven hundred eighty-two thousand, two hundred twenty-six".