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1180 = 22559

1180 has 12 divisors (see below), whose sum is σ = 2520. Its totient is φ = 464.

The previous prime is 1171. The next prime is 1181. The reversal of 1180 is 811.

Adding to 1180 its reverse (811), we get a palindrome (1991).

It can be divided in two parts, 11 and 80, that added together give a triangular number (91 = T13).

1180 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 8 and base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181) by changing a digit.

1180 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10 + ... + 49.

It is an arithmetic number, because the mean of its divisors is an integer number (210).

1180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1180 is an abundant number, since it is smaller than the sum of its proper divisors (1340).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260).

1180 is a wasteful number, since it uses less digits than its factorization.

1180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1180 is about 34.3511280746. The cubic root of 1180 is about 10.5672180526.

The spelling of 1180 in words is "one thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 59 118 236 295 590 1180