1149 has 4 divisors (see below), whose sum is σ = 1536. Its totient is φ = 764.

The previous prime is 1129. The next prime is 1151. The reversal of 1149 is 9411.

1149 = 7² + 8² + ... + 15².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9411 = 3 ⋅3137.

It is a cyclic number.

It is not a de Polignac number, because 1149 - 2⁵ = 1117 is a prime.

It is a D-number.

It is a plaindrome in base 10 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 (1109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189 + ... + 194.

It is an arithmetic number, because the mean of its divisors is an integer number (384).

It is an amenable number.

1149 is a deficient number, since it is larger than the sum of its proper divisors (387).

1149 is an equidigital number, since it uses as much as digits as its factorization.

1149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 36, while the sum is 15.

The square root of 1149 is about 33.8969025134. The cubic root of 1149 is about 10.4738578698.

The spelling of 1149 in words is "one thousand, one hundred forty-nine".