2284821 has 48 divisors (see below), whose sum is σ = 4322880. Its totient is φ = 1179360.

The previous prime is 2284757. The next prime is 2284831. The reversal of 2284821 is 1284822.

2284821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2284821 - 2⁶ = 2284757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

2284821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2284831) 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 47 ways as a sum of consecutive naturals, for example, 14475 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (90060).

2^2284821 is an apocalyptic number.

2284821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2284821 is a deficient number, since it is larger than the sum of its proper divisors (2038059).

2284821 is a wasteful number, since it uses less digits than its factorization.

2284821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 178 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 2284821 is about 1511.5624366860. The cubic root of 2284821 is about 131.7095888121.

Subtracting from 2284821 its reverse (1284822), we obtain a palindrome (999999).

The spelling of 2284821 in words is "two million, two hundred eighty-four thousand, eight hundred twenty-one".