961859 has 4 divisors (see below), whose sum is σ = 964104. Its totient is φ = 959616.

The previous prime is 961853. The next prime is 961861. The reversal of 961859 is 958169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958169 = 43 ⋅22283.

It is a cyclic number.

It is not a de Polignac number, because 961859 - 2¹⁶ = 896323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961853) 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, 257 + ... + 1410.

It is an arithmetic number, because the mean of its divisors is an integer number (241026).

2⁹⁶¹⁸⁵⁹ is an apocalyptic number.

961859 is a deficient number, since it is larger than the sum of its proper divisors (2245).

961859 is a wasteful number, since it uses less digits than its factorization.

961859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244.

The product of its digits is 19440, while the sum is 38.

The square root of 961859 is about 980.7441052589. The cubic root of 961859 is about 98.7121181409.

The spelling of 961859 in words is "nine hundred sixty-one thousand, eight hundred fifty-nine".