1813226 has 4 divisors (see below), whose sum is σ = 2719842. Its totient is φ = 906612.

The previous prime is 1813223. The next prime is 1813277. The reversal of 1813226 is 6223181.

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., 1452025 + 361201 = 1205^2 + 601^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1813223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453305 + ... + 453308.

2^1813226 is an apocalyptic number.

1813226 is a deficient number, since it is larger than the sum of its proper divisors (906616).

1813226 is an equidigital number, since it uses as much as digits as its factorization.

1813226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906615.

The product of its digits is 576, while the sum is 23.

The square root of 1813226 is about 1346.5608044199. The cubic root of 1813226 is about 121.9412509400.

The spelling of 1813226 in words is "one million, eight hundred thirteen thousand, two hundred twenty-six".