1982105 has 8 divisors (see below), whose sum is σ = 2419200. Its totient is φ = 1558576.

The previous prime is 1982093. The next prime is 1982111. The reversal of 1982105 is 5012891.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1982105 - 2¹⁰ = 1981081 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3065 + ... + 3654.

It is an arithmetic number, because the mean of its divisors is an integer number (302400).

2^1982105 is an apocalyptic number.

It is an amenable number.

1982105 is a deficient number, since it is larger than the sum of its proper divisors (437095).

1982105 is an equidigital number, since it uses as much as digits as its factorization.

1982105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1982105 is about 1407.8725084325. The cubic root of 1982105 is about 125.6152071935.

Adding to 1982105 its reverse (5012891), we get a palindrome (6994996).

The spelling of 1982105 in words is "one million, nine hundred eighty-two thousand, one hundred five".