12820547 has 2 divisors, whose sum is σ = 12820548. Its totient is φ = 12820546.

The previous prime is 12820531. The next prime is 12820559. The reversal of 12820547 is 74502821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12820547 - 2⁴ = 12820531 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12820747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410273 + 6410274.

It is an arithmetic number, because the mean of its divisors is an integer number (6410274).

Almost surely, 2^12820547 is an apocalyptic number.

12820547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12820547 is an equidigital number, since it uses as much as digits as its factorization.

12820547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12820547 is about 3580.5791430996. The cubic root of 12820547 is about 234.0465183773.

The spelling of 12820547 in words is "twelve million, eight hundred twenty thousand, five hundred forty-seven".