12520537 has 2 divisors, whose sum is σ = 12520538. Its totient is φ = 12520536.

The previous prime is 12520531. The next prime is 12520553. The reversal of 12520537 is 73502521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7958041 + 4562496 = 2821^2 + 2136^2 .

It is an emirp because it is prime and its reverse (73502521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12520537 - 2¹⁹ = 11996249 is a prime.

It is not a weakly prime, because it can be changed into another prime (12520531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260268 + 6260269.

It is an arithmetic number, because the mean of its divisors is an integer number (6260269).

Almost surely, 2^12520537 is an apocalyptic number.

It is an amenable number.

12520537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520537 is an equidigital number, since it uses as much as digits as its factorization.

12520537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 12520537 is about 3538.4370843637. The cubic root of 12520537 is about 232.2064712177.

The spelling of 12520537 in words is "twelve million, five hundred twenty thousand, five hundred thirty-seven".