12822521 has 2 divisors, whose sum is σ = 12822522. Its totient is φ = 12822520.

The previous prime is 12822517. The next prime is 12822541. The reversal of 12822521 is 12522821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 319225 = 3536^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 12822521 - 2² = 12822517 is a prime.

It is not a weakly prime, because it can be changed into another prime (12822541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6411260 + 6411261.

It is an arithmetic number, because the mean of its divisors is an integer number (6411261).

Almost surely, 2^12822521 is an apocalyptic number.

It is an amenable number.

12822521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12822521 is an equidigital number, since it uses as much as digits as its factorization.

12822521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 23.

The square root of 12822521 is about 3580.8547862207. The cubic root of 12822521 is about 234.0585299323.

The spelling of 12822521 in words is "twelve million, eight hundred twenty-two thousand, five hundred twenty-one".