1168661 has 4 divisors (see below), whose sum is σ = 1258572. Its totient is φ = 1078752.

The previous prime is 1168639. The next prime is 1168693. The reversal of 1168661 is 1668611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1668611 = 7 ⋅238373.

It can be written as a sum of positive squares in 2 ways, for example, as 180625 + 988036 = 425^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1168661 - 2¹⁰ = 1167637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1168621) 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, 44936 + ... + 44961.

It is an arithmetic number, because the mean of its divisors is an integer number (314643).

2^1168661 is an apocalyptic number.

It is an amenable number.

1168661 is a deficient number, since it is larger than the sum of its proper divisors (89911).

1168661 is an equidigital number, since it uses as much as digits as its factorization.

1168661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89910.

The product of its digits is 1728, while the sum is 29.

The square root of 1168661 is about 1081.0462524795. The cubic root of 1168661 is about 105.3326111774.

The spelling of 1168661 in words is "one million, one hundred sixty-eight thousand, six hundred sixty-one".