1171161 has 12 divisors (see below), whose sum is σ = 1737892. Its totient is φ = 759456.

The previous prime is 1171133. The next prime is 1171189. The reversal of 1171161 is 1611711.

It is an interprime number because it is at equal distance from previous prime (1171133) and next prime (1171189).

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 81225 = 1044^2 + 285^2 .

It is not a de Polignac number, because 1171161 - 2⁷ = 1171033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1426 + ... + 2091.

2^1171161 is an apocalyptic number.

It is an amenable number.

1171161 is a deficient number, since it is larger than the sum of its proper divisors (566731).

1171161 is a wasteful number, since it uses less digits than its factorization.

1171161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560 (or 3557 counting only the distinct ones).

The product of its digits is 42, while the sum is 18.

The square root of 1171161 is about 1082.2019220090. The cubic root of 1171161 is about 105.4076668687.

Adding to 1171161 its reverse (1611711), we get a palindrome (2782872).

The spelling of 1171161 in words is "one million, one hundred seventy-one thousand, one hundred sixty-one".