961805 has 8 divisors (see below), whose sum is σ = 1243032. Its totient is φ = 710208.

The previous prime is 961789. The next prime is 961811. The reversal of 961805 is 508169.

It can be written as a sum of positive squares in 4 ways, for example, as 3364 + 958441 = 58^2 + 979^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 961805 - 2⁴ = 961789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 7334 + ... + 7463.

It is an arithmetic number, because the mean of its divisors is an integer number (155379).

2⁹⁶¹⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

961805 is a deficient number, since it is larger than the sum of its proper divisors (281227).

961805 is a wasteful number, since it uses less digits than its factorization.

961805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14815.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 961805 is about 980.7165747554. The cubic root of 961805 is about 98.7102708313.

The spelling of 961805 in words is "nine hundred sixty-one thousand, eight hundred five".