12630521 has 2 divisors, whose sum is σ = 12630522. Its totient is φ = 12630520.

The previous prime is 12630517. The next prime is 12630523. The reversal of 12630521 is 12503621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 2676496 = 3155^2 + 1636^2 .

It is a cyclic number.

It is not a de Polignac number, because 12630521 - 2² = 12630517 is a prime.

Together with 12630523, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12630493 and 12630502.

It is not a weakly prime, because it can be changed into another prime (12630523) 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, 6315260 + 6315261.

It is an arithmetic number, because the mean of its divisors is an integer number (6315261).

Almost surely, 2^12630521 is an apocalyptic number.

It is an amenable number.

12630521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12630521 is an equidigital number, since it uses as much as digits as its factorization.

12630521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12630521 is about 3553.9444283781. The cubic root of 12630521 is about 232.8844128192.

The spelling of 12630521 in words is "twelve million, six hundred thirty thousand, five hundred twenty-one".