1812224 has 18 divisors (see below), whose sum is σ = 3617880. Its totient is φ = 905984.

The previous prime is 1812199. The next prime is 1812227. The reversal of 1812224 is 4222181.

It is a happy number.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1812196 and 1812205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3284 + ... + 3795.

2^1812224 is an apocalyptic number.

It is an amenable number.

1812224 is a deficient number, since it is larger than the sum of its proper divisors (1805656).

1812224 is an frugal number, since it uses more digits than its factorization.

1812224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7095 (or 7081 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 1812224 is about 1346.1886940544. The cubic root of 1812224 is about 121.9187849692.

The spelling of 1812224 in words is "one million, eight hundred twelve thousand, two hundred twenty-four".