1181868 has 24 divisors (see below), whose sum is σ = 2780400. Its totient is φ = 390720.

The previous prime is 1181839. The next prime is 1181879. The reversal of 1181868 is 8681811.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458 + ... + 2118.

It is an arithmetic number, because the mean of its divisors is an integer number (115850).

2^1181868 is an apocalyptic number.

It is an amenable number.

1181868 is an abundant number, since it is smaller than the sum of its proper divisors (1598532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1181868 is a wasteful number, since it uses less digits than its factorization.

1181868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 815 counting only the distinct ones).

The product of its digits is 3072, while the sum is 33.

The square root of 1181868 is about 1087.1375257988. The cubic root of 1181868 is about 105.7279126056.

The spelling of 1181868 in words is "one million, one hundred eighty-one thousand, eight hundred sixty-eight".