1821324 has 24 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 580624.

The previous prime is 1821319. The next prime is 1821331. The reversal of 1821324 is 4231281.

It is a super-2 number, since 2×1821324² = 6634442225952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1821324.

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 7 ways as a sum of consecutive naturals, for example, 3024 + ... + 3575.

It is an arithmetic number, because the mean of its divisors is an integer number (184800).

2^1821324 is an apocalyptic number.

It is an amenable number.

1821324 is an abundant number, since it is smaller than the sum of its proper divisors (2613876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1821324 is a wasteful number, since it uses less digits than its factorization.

1821324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629 (or 6627 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1821324 is about 1349.5643741593. The cubic root of 1821324 is about 122.1225142121.

It can be divided in two parts, 1821 and 324, that added together give a triangular number (2145 = T₆₅).

The spelling of 1821324 in words is "one million, eight hundred twenty-one thousand, three hundred twenty-four".