12149 has 2 divisors, whose sum is σ = 12150.
Its totient is φ = 12148.
The previous prime is 12143. The next prime is 12157. The reversal of 12149 is 94121.
Adding to 12149 its product of digits (72), we get a palindrome (12221).
It can be divided in two parts, 121 and 49, that multiplied together give a square (5929 = 772).
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 12100 + 49 = 110^2 + 7^2
It is an emirp because it is prime and its reverse (94121) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12149 - 212 = 8053 is a prime.
It is a Chen prime.
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 15.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 12149.
It is not a weakly prime, because it can be changed into another prime (12143) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074 + 6075.
It is an arithmetic number, because the mean of its divisors is an integer number (6075).
212149 is an apocalyptic number.
It is an amenable number.
12149 is a deficient number, since it is larger than the sum of its proper divisors (1).
12149 is an equidigital number, since it uses as much as digits as its factorization.
12149 is an evil number, because the sum of its binary digits is even.
The product of its digits is 72, while the sum is 17.
The square root of 12149 is about 110.2225022398.
Note that the first 3 decimals coincide.
The cubic root of 12149 is about 22.9886522472.
The spelling of 12149 in words is "twelve thousand, one hundred forty-nine".