12149287 has 4 divisors (see below), whose sum is σ = 12158640. Its totient is φ = 12139936.

The previous prime is 12149273. The next prime is 12149299. The reversal of 12149287 is 78294121.

12149287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 78294121 = 59 ⋅1327019.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12149287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12149257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2338 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (3039660).

Almost surely, 2^12149287 is an apocalyptic number.

12149287 is a deficient number, since it is larger than the sum of its proper divisors (9353).

12149287 is an equidigital number, since it uses as much as digits as its factorization.

12149287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9352.

The product of its digits is 8064, while the sum is 34.

The square root of 12149287 is about 3485.5827346371. The cubic root of 12149287 is about 229.8883326867. Note that the first 3 decimals are identical.

It can be divided in two parts, 1214 and 9287, that added together give a palindrome (10501).

The spelling of 12149287 in words is "twelve million, one hundred forty-nine thousand, two hundred eighty-seven".