12159281 has 2 divisors, whose sum is σ = 12159282. Its totient is φ = 12159280.

The previous prime is 12159187. The next prime is 12159307. The reversal of 12159281 is 18295121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 21025 = 3484^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 12159281 - 2¹⁰ = 12158257 is a prime.

It is a super-2 number, since 2×12159281² = 295696228873922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12159181) 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, 6079640 + 6079641.

It is an arithmetic number, because the mean of its divisors is an integer number (6079641).

Almost surely, 2^12159281 is an apocalyptic number.

It is an amenable number.

12159281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12159281 is an equidigital number, since it uses as much as digits as its factorization.

12159281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 29.

The square root of 12159281 is about 3487.0160596131. The cubic root of 12159281 is about 229.9513507691.

The spelling of 12159281 in words is "twelve million, one hundred fifty-nine thousand, two hundred eighty-one".