12146749 has 2 divisors, whose sum is σ = 12146750. Its totient is φ = 12146748.

The previous prime is 12146741. The next prime is 12146753. The reversal of 12146749 is 94764121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7812025 + 4334724 = 2795^2 + 2082^2 .

It is an emirp because it is prime and its reverse (94764121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12146749 - 2³ = 12146741 is a prime.

It is a super-2 number, since 2×12146749² = 295087022538002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12146741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6073374 + 6073375.

It is an arithmetic number, because the mean of its divisors is an integer number (6073375).

Almost surely, 2^12146749 is an apocalyptic number.

It is an amenable number.

12146749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12146749 is an equidigital number, since it uses as much as digits as its factorization.

12146749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 12146749 is about 3485.2186445042. The cubic root of 12146749 is about 229.8723235930.

The spelling of 12146749 in words is "twelve million, one hundred forty-six thousand, seven hundred forty-nine".