1168981 has 6 divisors (see below), whose sum is σ = 1285046. Its totient is φ = 1062600.

The previous prime is 1168969. The next prime is 1168987. The reversal of 1168981 is 1898611.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 576081 = 770^2 + 759^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1168981 is a prime.

It is a super-2 number, since 2×1168981² = 2733033156722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1168987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4710 + ... + 4951.

2^1168981 is an apocalyptic number.

1168981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1168981 is a deficient number, since it is larger than the sum of its proper divisors (116065).

1168981 is an equidigital number, since it uses as much as digits as its factorization.

1168981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9683 (or 9672 counting only the distinct ones).

The product of its digits is 3456, while the sum is 34.

The square root of 1168981 is about 1081.1942471175. The cubic root of 1168981 is about 105.3422242758.

The spelling of 1168981 in words is "one million, one hundred sixty-eight thousand, nine hundred eighty-one".