1982565 has 24 divisors (see below), whose sum is σ = 3701880. Its totient is φ = 975744.

The previous prime is 1982551. The next prime is 1982567. The reversal of 1982565 is 5652891.

It is a happy number.

1982565 is a `hidden beast` number, since 1 + 98 + 2 + 565 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 349281 + 1633284 = 591^2 + 1278^2 .

It is not a de Polignac number, because 1982565 - 2⁶ = 1982501 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 1110 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (154245).

2^1982565 is an apocalyptic number.

1982565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1982565 is a deficient number, since it is larger than the sum of its proper divisors (1719315).

1982565 is a wasteful number, since it uses less digits than its factorization.

1982565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3413 (or 3410 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1982565 is about 1408.0358660205. The cubic root of 1982565 is about 125.6249238880.

The spelling of 1982565 in words is "one million, nine hundred eighty-two thousand, five hundred sixty-five".