1166505 has 16 divisors (see below), whose sum is σ = 1965120. Its totient is φ = 589248.

The previous prime is 1166497. The next prime is 1166507. The reversal of 1166505 is 5056611.

It is not a de Polignac number, because 1166505 - 2³ = 1166497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1762 + ... + 2331.

It is an arithmetic number, because the mean of its divisors is an integer number (122820).

2^1166505 is an apocalyptic number.

1166505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166505 is a deficient number, since it is larger than the sum of its proper divisors (798615).

1166505 is a wasteful number, since it uses less digits than its factorization.

1166505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4120.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1166505 is about 1080.0486100172. The cubic root of 1166505 is about 105.2677971420.

The spelling of 1166505 in words is "one million, one hundred sixty-six thousand, five hundred five".