1968565 has 4 divisors (see below), whose sum is σ = 2362284. Its totient is φ = 1574848.

The previous prime is 1968563. The next prime is 1968569. The reversal of 1968565 is 5658691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 872356 + 1096209 = 934^2 + 1047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968565 - 2¹ = 1968563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968563) 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 3 ways as a sum of consecutive naturals, for example, 196852 + ... + 196861.

It is an arithmetic number, because the mean of its divisors is an integer number (590571).

2^1968565 is an apocalyptic number.

It is an amenable number.

1968565 is a deficient number, since it is larger than the sum of its proper divisors (393719).

1968565 is an equidigital number, since it uses as much as digits as its factorization.

1968565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393718.

The product of its digits is 64800, while the sum is 40.

The square root of 1968565 is about 1403.0555940518. The cubic root of 1968565 is about 125.3285224940.

The spelling of 1968565 in words is "one million, nine hundred sixty-eight thousand, five hundred sixty-five".