1166111 has 4 divisors (see below), whose sum is σ = 1168272. Its totient is φ = 1163952.

The previous prime is 1166107. The next prime is 1166131. The reversal of 1166111 is 1116611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1166111 - 2² = 1166107 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1166111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (292068).

2^1166111 is an apocalyptic number.

1166111 is a deficient number, since it is larger than the sum of its proper divisors (2161).

1166111 is a wasteful number, since it uses less digits than its factorization.

1166111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160.

The product of its digits is 36, while the sum is 17.

The square root of 1166111 is about 1079.8661954150. The cubic root of 1166111 is about 105.2559440188.

It can be divided in two parts, 11661 and 11, that multiplied together give a triangular number (128271 = T₅₀₆).

The spelling of 1166111 in words is "one million, one hundred sixty-six thousand, one hundred eleven".