1181867 has 4 divisors (see below), whose sum is σ = 1192440. Its totient is φ = 1171296.

The previous prime is 1181839. The next prime is 1181879. The reversal of 1181867 is 7681811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1181867 - 2⁸ = 1181611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181897) 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, 5117 + ... + 5342.

It is an arithmetic number, because the mean of its divisors is an integer number (298110).

2^1181867 is an apocalyptic number.

1181867 is a deficient number, since it is larger than the sum of its proper divisors (10573).

1181867 is a wasteful number, since it uses less digits than its factorization.

1181867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572.

The product of its digits is 2688, while the sum is 32.

The square root of 1181867 is about 1087.1370658753. The cubic root of 1181867 is about 105.7278827862.

It can be divided in two parts, 1181 and 867, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1181867 in words is "one million, one hundred eighty-one thousand, eight hundred sixty-seven".