12758281 has 2 divisors, whose sum is σ = 12758282. Its totient is φ = 12758280.

The previous prime is 12758269. The next prime is 12758287. The reversal of 12758281 is 18285721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12673600 + 84681 = 3560^2 + 291^2 .

It is a cyclic number.

It is not a de Polignac number, because 12758281 - 2¹⁵ = 12725513 is a prime.

It is a super-2 number, since 2×12758281² = 325547468149922, which contains 22 as substring.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (12758287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6379140 + 6379141.

It is an arithmetic number, because the mean of its divisors is an integer number (6379141).

Almost surely, 2^12758281 is an apocalyptic number.

It is an amenable number.

12758281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12758281 is an equidigital number, since it uses as much as digits as its factorization.

12758281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 34.

The square root of 12758281 is about 3571.8735979875. The cubic root of 12758281 is about 233.6670026669.

The spelling of 12758281 in words is "twelve million, seven hundred fifty-eight thousand, two hundred eighty-one".