1166555 has 16 divisors (see below), whose sum is σ = 1530144. Its totient is φ = 848640.

The previous prime is 1166549. The next prime is 1166563. The reversal of 1166555 is 5556611.

It is not a de Polignac number, because 1166555 - 2¹⁰ = 1165531 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8447 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (95634).

2^1166555 is an apocalyptic number.

1166555 is a deficient number, since it is larger than the sum of its proper divisors (363589).

1166555 is a wasteful number, since it uses less digits than its factorization.

1166555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286.

The product of its digits is 4500, while the sum is 29.

The square root of 1166555 is about 1080.0717568754. The cubic root of 1166555 is about 105.2693011546.

It can be divided in two parts, 11 and 66555, that added together give a palindrome (66566).

The spelling of 1166555 in words is "one million, one hundred sixty-six thousand, five hundred fifty-five".