12149749 has 2 divisors, whose sum is σ = 12149750. Its totient is φ = 12149748.

The previous prime is 12149741. The next prime is 12149771. The reversal of 12149749 is 94794121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10692900 + 1456849 = 3270^2 + 1207^2 .

It is an emirp because it is prime and its reverse (94794121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12149749 - 2³ = 12149741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12149741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074874 + 6074875.

It is an arithmetic number, because the mean of its divisors is an integer number (6074875).

Almost surely, 2^12149749 is an apocalyptic number.

It is an amenable number.

12149749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12149749 is an equidigital number, since it uses as much as digits as its factorization.

12149749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 12149749 is about 3485.6490070000. The cubic root of 12149749 is about 229.8912466317.

The spelling of 12149749 in words is "twelve million, one hundred forty-nine thousand, seven hundred forty-nine".