1181055 has 8 divisors (see below), whose sum is σ = 1889712. Its totient is φ = 629888.

The previous prime is 1181053. The next prime is 1181057. The reversal of 1181055 is 5501811.

It is an interprime number because it is at equal distance from previous prime (1181053) and next prime (1181057).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1181055 - 2¹ = 1181053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181051) 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 7 ways as a sum of consecutive naturals, for example, 39354 + ... + 39383.

It is an arithmetic number, because the mean of its divisors is an integer number (236214).

2^1181055 is an apocalyptic number.

1181055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1181055 is a deficient number, since it is larger than the sum of its proper divisors (708657).

1181055 is an equidigital number, since it uses as much as digits as its factorization.

1181055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78745.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 1181055 is about 1086.7635437389. The cubic root of 1181055 is about 105.7036638429.

Adding to 1181055 its reverse (5501811), we get a palindrome (6682866).

The spelling of 1181055 in words is "one million, one hundred eighty-one thousand, fifty-five".