1165866 has 16 divisors (see below), whose sum is σ = 2511264. Its totient is φ = 358704.

The previous prime is 1165861. The next prime is 1165873. The reversal of 1165866 is 6685611.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1165861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7396 + ... + 7551.

It is an arithmetic number, because the mean of its divisors is an integer number (156954).

2^1165866 is an apocalyptic number.

1165866 is an abundant number, since it is smaller than the sum of its proper divisors (1345398).

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

1165866 is a wasteful number, since it uses less digits than its factorization.

1165866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14965.

The product of its digits is 8640, while the sum is 33.

The square root of 1165866 is about 1079.7527494755. The cubic root of 1165866 is about 105.2485720755.

The spelling of 1165866 in words is "one million, one hundred sixty-five thousand, eight hundred sixty-six".