12288581 has 2 divisors, whose sum is σ = 12288582. Its totient is φ = 12288580.

The previous prime is 12288559. The next prime is 12288587. The reversal of 12288581 is 18588221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 2265025 = 3166^2 + 1505^2 .

It is an emirp because it is prime and its reverse (18588221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12288581 - 2⁶ = 12288517 is a prime.

It is a super-2 number, since 2×12288581² = 302018445987122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12288587) 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, 6144290 + 6144291.

It is an arithmetic number, because the mean of its divisors is an integer number (6144291).

Almost surely, 2^12288581 is an apocalyptic number.

It is an amenable number.

12288581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12288581 is an equidigital number, since it uses as much as digits as its factorization.

12288581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 35.

The square root of 12288581 is about 3505.5072386175. The cubic root of 12288581 is about 230.7635681146.

The spelling of 12288581 in words is "twelve million, two hundred eighty-eight thousand, five hundred eighty-one".