12530521 has 2 divisors, whose sum is σ = 12530522. Its totient is φ = 12530520.

The previous prime is 12530509. The next prime is 12530569. The reversal of 12530521 is 12503521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 27225 = 3536^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 12530521 - 2⁵ = 12530489 is a prime.

It is not a weakly prime, because it can be changed into another prime (12530321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265260 + 6265261.

It is an arithmetic number, because the mean of its divisors is an integer number (6265261).

Almost surely, 2^12530521 is an apocalyptic number.

It is an amenable number.

12530521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12530521 is an equidigital number, since it uses as much as digits as its factorization.

12530521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 12530521 is about 3539.8475955894. The cubic root of 12530521 is about 232.2681760646.

Subtracting from 12530521 its reverse (12503521), we obtain a cube (27000 = 30³).

The spelling of 12530521 in words is "twelve million, five hundred thirty thousand, five hundred twenty-one".