1805224 has 16 divisors (see below), whose sum is σ = 3532320. Its totient is φ = 863280.

The previous prime is 1805203. The next prime is 1805227. The reversal of 1805224 is 4225081.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1805195 and 1805204.

It is not an unprimeable number, because it can be changed into a prime (1805227) 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 in 3 ways as a sum of consecutive naturals, for example, 4722 + ... + 5089.

It is an arithmetic number, because the mean of its divisors is an integer number (220770).

2^1805224 is an apocalyptic number.

It is an amenable number.

1805224 is a deficient number, since it is larger than the sum of its proper divisors (1727096).

1805224 is a wasteful number, since it uses less digits than its factorization.

1805224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9840 (or 9836 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1805224 is about 1343.5862458361. The cubic root of 1805224 is about 121.7616055961.

The spelling of 1805224 in words is "one million, eight hundred five thousand, two hundred twenty-four".