1821282 has 8 divisors (see below), whose sum is σ = 3642576. Its totient is φ = 607092.

The previous prime is 1821263. The next prime is 1821289. The reversal of 1821282 is 2821281.

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

1821282 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1821289) 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, 151768 + ... + 151779.

It is an arithmetic number, because the mean of its divisors is an integer number (455322).

2^1821282 is an apocalyptic number.

1821282 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1821282 is a wasteful number, since it uses less digits than its factorization.

1821282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303552.

The product of its digits is 512, while the sum is 24.

The square root of 1821282 is about 1349.5488134929. The cubic root of 1821282 is about 122.1215754838.

Subtracting 1821282 from its reverse (2821281), we obtain a palindrome (999999).

The spelling of 1821282 in words is "one million, eight hundred twenty-one thousand, two hundred eighty-two".