12555281 has 2 divisors, whose sum is σ = 12555282. Its totient is φ = 12555280.

The previous prime is 12555241. The next prime is 12555287. The reversal of 12555281 is 18255521.

12555281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6330256 + 6225025 = 2516^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 12555281 - 2¹⁰ = 12554257 is a prime.

It is a super-2 number, since 2×12555281² = 315270161977922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12555287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277640 + 6277641.

It is an arithmetic number, because the mean of its divisors is an integer number (6277641).

Almost surely, 2^12555281 is an apocalyptic number.

It is an amenable number.

12555281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555281 is an equidigital number, since it uses as much as digits as its factorization.

12555281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000, while the sum is 29.

The square root of 12555281 is about 3543.3431953453. The cubic root of 12555281 is about 232.4210608030.

The spelling of 12555281 in words is "twelve million, five hundred fifty-five thousand, two hundred eighty-one".