961565 has 8 divisors (see below), whose sum is σ = 1258848. Its totient is φ = 699280.

The previous prime is 961549. The next prime is 961567. The reversal of 961565 is 565169.

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

It is not a de Polignac number, because 961565 - 2⁴ = 961549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 961565.

It is not an unprimeable number, because it can be changed into a prime (961567) 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 7 ways as a sum of consecutive naturals, for example, 8687 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (157356).

2⁹⁶¹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

961565 is a deficient number, since it is larger than the sum of its proper divisors (297283).

961565 is a wasteful number, since it uses less digits than its factorization.

961565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17499.

The product of its digits is 8100, while the sum is 32.

The square root of 961565 is about 980.5942076109. The cubic root of 961565 is about 98.7020597297.

It can be divided in two parts, 96 and 1565, that added together give a palindrome (1661).

The spelling of 961565 in words is "nine hundred sixty-one thousand, five hundred sixty-five".