12015281 has 2 divisors, whose sum is σ = 12015282. Its totient is φ = 12015280.

The previous prime is 12015271. The next prime is 12015287. The reversal of 12015281 is 18251021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 43681 = 3460^2 + 209^2 .

It is an emirp because it is prime and its reverse (18251021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12015281 - 2⁶ = 12015217 is a prime.

It is a super-2 number, since 2×12015281² = 288733955017922, 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 (12015287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007640 + 6007641.

It is an arithmetic number, because the mean of its divisors is an integer number (6007641).

Almost surely, 2^12015281 is an apocalyptic number.

It is an amenable number.

12015281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015281 is an equidigital number, since it uses as much as digits as its factorization.

12015281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 12015281 is about 3466.3065357813. The cubic root of 12015281 is about 229.0399871693.

The spelling of 12015281 in words is "twelve million, fifteen thousand, two hundred eighty-one".