1181668 has 6 divisors (see below), whose sum is σ = 2067926. Its totient is φ = 590832.

The previous prime is 1181647. The next prime is 1181681. The reversal of 1181668 is 8661811.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 53824 = 1062^2 + 232^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 147705 + ... + 147712.

2^1181668 is an apocalyptic number.

It is an amenable number.

1181668 is a deficient number, since it is larger than the sum of its proper divisors (886258).

1181668 is a wasteful number, since it uses less digits than its factorization.

1181668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295421 (or 295419 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1181668 is about 1087.0455372246. The cubic root of 1181668 is about 105.7219483819.

It can be divided in two parts, 1181 and 668, that added together give a square (1849 = 43²).

The spelling of 1181668 in words is "one million, one hundred eighty-one thousand, six hundred sixty-eight".