12258749 has 2 divisors, whose sum is σ = 12258750. Its totient is φ = 12258748.

The previous prime is 12258739. The next prime is 12258761. The reversal of 12258749 is 94785221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10936249 + 1322500 = 3307^2 + 1150^2 .

It is an emirp because it is prime and its reverse (94785221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12258749 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12258739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6129374 + 6129375.

It is an arithmetic number, because the mean of its divisors is an integer number (6129375).

Almost surely, 2^12258749 is an apocalyptic number.

It is an amenable number.

12258749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12258749 is an equidigital number, since it uses as much as digits as its factorization.

12258749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 12258749 is about 3501.2496340592. The cubic root of 12258749 is about 230.5766814166.

The spelling of 12258749 in words is "twelve million, two hundred fifty-eight thousand, seven hundred forty-nine".