1181087 has 4 divisors (see below), whose sum is σ = 1209936. Its totient is φ = 1152240.

The previous prime is 1181057. The next prime is 1181093. The reversal of 1181087 is 7801811.

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 1181087 - 2⁶ = 1181023 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 (1181017) 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, 14363 + ... + 14444.

It is an arithmetic number, because the mean of its divisors is an integer number (302484).

2^1181087 is an apocalyptic number.

1181087 is a deficient number, since it is larger than the sum of its proper divisors (28849).

1181087 is an equidigital number, since it uses as much as digits as its factorization.

1181087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28848.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 1181087 is about 1086.7782662531. The cubic root of 1181087 is about 105.7046184941.

Adding to 1181087 its reverse (7801811), we get a palindrome (8982898).

The spelling of 1181087 in words is "one million, one hundred eighty-one thousand, eighty-seven".