1129 has 2 divisors, whose sum is σ = 1130.
Its totient is φ = 1128.
The previous prime is 1123. The next prime is 1151. The reversal of 1129 is 9211.
Subtracting from 1129 its product of digits (18), we obtain a palindrome (1111).
It can be divided in two parts, 112 and 9, that added together give a palindrome (121).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 729 + 400 = 27^2 + 20^2
It is a cyclic number.
It is not a de Polignac number, because 1129 - 25 = 1097 is a prime.
It is a pancake number, because a pancake can be divided into 1129 parts by 47 straight cuts.
It is a plaindrome in base 10, base 13 and base 16.
It is a zygodrome in base 3.
It is not a weakly prime, because it can be changed into another prime (1123) by changing a digit.
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 as a sum of consecutive naturals, namely, 564 + 565.
It is an arithmetic number, because the mean of its divisors is an integer number (565).
It is an amenable number.
1129 is a deficient number, since it is larger than the sum of its proper divisors (1).
1129 is an equidigital number, since it uses as much as digits as its factorization.
1129 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 18, while the sum is 13.
The square root of 1129 is about 33.6005952328.
The cubic root of 1129 is about 10.4127309576.
The spelling of 1129 in words is "one thousand, one hundred twenty-nine".