12930581 has 2 divisors, whose sum is σ = 12930582. Its totient is φ = 12930580.

The previous prime is 12930571. The next prime is 12930647. The reversal of 12930581 is 18503921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 2907025 = 3166^2 + 1705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12930581 is a prime.

It is a super-2 number, since 2×12930581² = 334399849995122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12930521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6465290 + 6465291.

It is an arithmetic number, because the mean of its divisors is an integer number (6465291).

Almost surely, 2^12930581 is an apocalyptic number.

It is an amenable number.

12930581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12930581 is an equidigital number, since it uses as much as digits as its factorization.

12930581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12930581 is about 3595.9117063688. The cubic root of 12930581 is about 234.7141900333.

The spelling of 12930581 in words is "twelve million, nine hundred thirty thousand, five hundred eighty-one".