1171166205 has 64 divisors (see below), whose sum is σ = 2131992576. Its totient is φ = 543840000.

The previous prime is 1171166201. The next prime is 1171166207. The reversal of 1171166205 is 5026611711.

It is not a de Polignac number, because 1171166205 - 2² = 1171166201 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171166201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 515482 + ... + 517748.

It is an arithmetic number, because the mean of its divisors is an integer number (33312384).

Almost surely, 2^1171166205 is an apocalyptic number.

1171166205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1171166205 is a deficient number, since it is larger than the sum of its proper divisors (960826371).

1171166205 is a wasteful number, since it uses less digits than its factorization.

1171166205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1171166205 is about 34222.3056645808. The cubic root of 1171166205 is about 1054.0782302317.

Adding to 1171166205 its reverse (5026611711), we get a palindrome (6197777916).

It can be divided in two parts, 117116 and 6205, that added together give a palindrome (123321).

The spelling of 1171166205 in words is "one billion, one hundred seventy-one million, one hundred sixty-six thousand, two hundred five".