12930561 has 36 divisors (see below), whose sum is σ = 22007700. Its totient is φ = 7293888.

The previous prime is 12930551. The next prime is 12930571. The reversal of 12930561 is 16503921.

12930561 is a `hidden beast` number, since 12 + 93 + 0 + 561 = 666.

It is an interprime number because it is at equal distance from previous prime (12930551) and next prime (12930571).

It can be written as a sum of positive squares in 2 ways, for example, as 4410000 + 8520561 = 2100^2 + 2919^2 .

It is not a de Polignac number, because 12930561 - 2⁵ = 12930529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12930521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47935 + ... + 48203.

It is an arithmetic number, because the mean of its divisors is an integer number (611325).

Almost surely, 2^12930561 is an apocalyptic number.

It is an amenable number.

12930561 is a deficient number, since it is larger than the sum of its proper divisors (9077139).

12930561 is a wasteful number, since it uses less digits than its factorization.

12930561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12930561 is about 3595.9089254318. The cubic root of 12930561 is about 234.7140690208.

The spelling of 12930561 in words is "twelve million, nine hundred thirty thousand, five hundred sixty-one".