12957149 has 2 divisors, whose sum is σ = 12957150. Its totient is φ = 12957148.

The previous prime is 12957137. The next prime is 12957151. The reversal of 12957149 is 94175921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 33124 = 3595^2 + 182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12957149 is a prime.

It is a Sophie Germain prime.

Together with 12957151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12957649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478574 + 6478575.

It is an arithmetic number, because the mean of its divisors is an integer number (6478575).

Almost surely, 2^12957149 is an apocalyptic number.

It is an amenable number.

12957149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12957149 is an equidigital number, since it uses as much as digits as its factorization.

12957149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 12957149 is about 3599.6040059984. The cubic root of 12957149 is about 234.8748329976.

The spelling of 12957149 in words is "twelve million, nine hundred fifty-seven thousand, one hundred forty-nine".