1166155 has 4 divisors (see below), whose sum is σ = 1399392. Its totient is φ = 932920.

The previous prime is 1166153. The next prime is 1166213. The reversal of 1166155 is 5516611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5516611 = 53 ⋅104087.

It is not a de Polignac number, because 1166155 - 2¹ = 1166153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166153) 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, 116611 + ... + 116620.

It is an arithmetic number, because the mean of its divisors is an integer number (349848).

2^1166155 is an apocalyptic number.

1166155 is a deficient number, since it is larger than the sum of its proper divisors (233237).

1166155 is an equidigital number, since it uses as much as digits as its factorization.

1166155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233236.

The product of its digits is 900, while the sum is 25.

The square root of 1166155 is about 1079.8865681172. The cubic root of 1166155 is about 105.2572678503.

It can be divided in two parts, 11 and 66155, that added together give a palindrome (66166).

The spelling of 1166155 in words is "one million, one hundred sixty-six thousand, one hundred fifty-five".