1159866 has 32 divisors (see below), whose sum is σ = 2638080. Its totient is φ = 377568.

The previous prime is 1159861. The next prime is 1159877. The reversal of 1159866 is 6689511.

1159866 is a `hidden beast` number, since 1 + 1 + 598 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1159866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159861) 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 15 ways as a sum of consecutive naturals, for example, 2310 + ... + 2766.

It is an arithmetic number, because the mean of its divisors is an integer number (82440).

2^1159866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1159866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1319040).

1159866 is an abundant number, since it is smaller than the sum of its proper divisors (1478214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1159866 is a wasteful number, since it uses less digits than its factorization.

1159866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 509 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1159866 is about 1076.9707516920. The cubic root of 1159866 is about 105.0677114275.

It can be divided in two parts, 11598 and 66, that added together give a square (11664 = 108²).

The spelling of 1159866 in words is "one million, one hundred fifty-nine thousand, eight hundred sixty-six".