1982566 has 8 divisors (see below), whose sum is σ = 2981664. Its totient is φ = 988680.

The previous prime is 1982551. The next prime is 1982567. The reversal of 1982566 is 6652891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145 + ... + 1996.

It is an arithmetic number, because the mean of its divisors is an integer number (372708).

2^1982566 is an apocalyptic number.

1982566 is a deficient number, since it is larger than the sum of its proper divisors (999098).

1982566 is a wasteful number, since it uses less digits than its factorization.

1982566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its digits is 25920, while the sum is 37.

The square root of 1982566 is about 1408.0362211250. The cubic root of 1982566 is about 125.6249450096.

It can be divided in two parts, 19825 and 66, that added together give a palindrome (19891).

The spelling of 1982566 in words is "one million, nine hundred eighty-two thousand, five hundred sixty-six".