12506537 has 2 divisors, whose sum is σ = 12506538. Its totient is φ = 12506536.

The previous prime is 12506519. The next prime is 12506561. The reversal of 12506537 is 73560521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10916416 + 1590121 = 3304^2 + 1261^2 .

It is an emirp because it is prime and its reverse (73560521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12506537 - 2¹⁶ = 12441001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12506567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253268 + 6253269.

It is an arithmetic number, because the mean of its divisors is an integer number (6253269).

Almost surely, 2^12506537 is an apocalyptic number.

It is an amenable number.

12506537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12506537 is an equidigital number, since it uses as much as digits as its factorization.

12506537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 12506537 is about 3536.4582565047. The cubic root of 12506537 is about 232.1198907187.

The spelling of 12506537 in words is "twelve million, five hundred six thousand, five hundred thirty-seven".