12531149 has 2 divisors, whose sum is σ = 12531150. Its totient is φ = 12531148.

The previous prime is 12531137. The next prime is 12531151. The reversal of 12531149 is 94113521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10355524 + 2175625 = 3218^2 + 1475^2 .

It is an emirp because it is prime and its reverse (94113521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12531149 - 2⁴ = 12531133 is a prime.

It is a Sophie Germain prime.

Together with 12531151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

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 (12531349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265574 + 6265575.

It is an arithmetic number, because the mean of its divisors is an integer number (6265575).

Almost surely, 2^12531149 is an apocalyptic number.

It is an amenable number.

12531149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12531149 is an equidigital number, since it uses as much as digits as its factorization.

12531149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 12531149 is about 3539.9362988619. The cubic root of 12531149 is about 232.2720562432.

The spelling of 12531149 in words is "twelve million, five hundred thirty-one thousand, one hundred forty-nine".