3565 has 8 divisors (see below), whose sum is σ = 4608. Its totient is φ = 2640.

The previous prime is 3559. The next prime is 3571. The reversal of 3565 is 5653.

3565 is nontrivially palindromic in base 16.

3565 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (3559) and next prime (3571).

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

It is not a de Polignac number, because 3565 - 2³ = 3557 is a prime.

It is a Duffinian number.

3565 is an undulating number in base 16.

3565 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100 + ... + 130.

It is an arithmetic number, because the mean of its divisors is an integer number (576).

It is an amenable number.

3565 is a deficient number, since it is larger than the sum of its proper divisors (1043).

3565 is a wasteful number, since it uses less digits than its factorization.

3565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59.

The product of its digits is 450, while the sum is 19.

The square root of 3565 is about 59.7076209541. The cubic root of 3565 is about 15.2763586071.

It can be divided in two parts, 356 and 5, that added together give a square (361 = 19²).

The spelling of 3565 in words is "three thousand, five hundred sixty-five".