961559 has 4 divisors (see below), whose sum is σ = 964320. Its totient is φ = 958800.

The previous prime is 961549. The next prime is 961567. The reversal of 961559 is 955169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955169 = 463 ⋅2063.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961559 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 961559.

It is not an unprimeable number, because it can be changed into a prime (961529) 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, 767 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (241080).

2⁹⁶¹⁵⁵⁹ is an apocalyptic number.

961559 is a deficient number, since it is larger than the sum of its proper divisors (2761).

961559 is a wasteful number, since it uses less digits than its factorization.

961559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760.

The product of its digits is 12150, while the sum is 35.

The square root of 961559 is about 980.5911482366. The cubic root of 961559 is about 98.7018544346.

The spelling of 961559 in words is "nine hundred sixty-one thousand, five hundred fifty-nine".