1151 has 2 divisors, whose sum is σ = 1152.
Its totient is φ = 1150.
The previous prime is 1129. The next prime is 1153. The reversal of 1151 is 1511.
Adding to 1151 its reverse (1511), we get a palindrome (2662).
It can be divided in two parts, 11 and 51, that multiplied together give a triangular number (561 = T33).
It is a happy number.
It is a strong prime.
It is an emirp because it is prime and its reverse (1511) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1151 - 26 = 1087 is a prime.
Together with 1153, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 12 and base 16.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1153) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575 + 576.
It is an arithmetic number, because the mean of its divisors is an integer number (576).
1151 is a deficient number, since it is larger than the sum of its proper divisors (1).
1151 is an equidigital number, since it uses as much as digits as its factorization.
1151 is an evil number, because the sum of its binary digits is even.
The product of its digits is 5, while the sum is 8.
The square root of 1151 is about 33.9263909074.
The cubic root of 1151 is about 10.4799314332.
The spelling of 1151 in words is "one thousand, one hundred fifty-one".