1822005 has 24 divisors (see below), whose sum is σ = 3325920. Its totient is φ = 920160.

The previous prime is 1822003. The next prime is 1822013. The reversal of 1822005 is 5002281.

It is not a de Polignac number, because 1822005 - 2¹ = 1822003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211 + ... + 1920.

It is an arithmetic number, because the mean of its divisors is an integer number (138580).

2^1822005 is an apocalyptic number.

1822005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1822005 is a deficient number, since it is larger than the sum of its proper divisors (1503915).

1822005 is a wasteful number, since it uses less digits than its factorization.

1822005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1822005 is about 1349.8166542164. The cubic root of 1822005 is about 122.1377330070.

Adding to 1822005 its reverse (5002281), we get a palindrome (6824286).

It can be divided in two parts, 182 and 2005, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1822005 in words is "one million, eight hundred twenty-two thousand, five".