12531637 has 2 divisors, whose sum is σ = 12531638. Its totient is φ = 12531636.

The previous prime is 12531593. The next prime is 12531643. The reversal of 12531637 is 73613521.

12531637 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7177041 + 5354596 = 2679^2 + 2314^2 .

It is an emirp because it is prime and its reverse (73613521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12531637 - 2¹⁵ = 12498869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12531647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265818 + 6265819.

It is an arithmetic number, because the mean of its divisors is an integer number (6265819).

Almost surely, 2^12531637 is an apocalyptic number.

It is an amenable number.

12531637 is a deficient number, since it is larger than the sum of its proper divisors (1).

12531637 is an equidigital number, since it uses as much as digits as its factorization.

12531637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 12531637 is about 3540.0052259848. The cubic root of 12531637 is about 232.2750713243.

The spelling of 12531637 in words is "twelve million, five hundred thirty-one thousand, six hundred thirty-seven".