11868281 has 2 divisors, whose sum is σ = 11868282. Its totient is φ = 11868280.

The previous prime is 11868251. The next prime is 11868287. The reversal of 11868281 is 18286811.

11868281 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., 11868025 + 256 = 3445^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 11868281 - 2¹⁸ = 11606137 is a prime.

It is a super-2 number, since 2×11868281² = 281712187789922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11868287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5934140 + 5934141.

It is an arithmetic number, because the mean of its divisors is an integer number (5934141).

Almost surely, 2^11868281 is an apocalyptic number.

It is an amenable number.

11868281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11868281 is an equidigital number, since it uses as much as digits as its factorization.

11868281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 35.

The square root of 11868281 is about 3445.0371550972. The cubic root of 11868281 is about 228.1020946790.

The spelling of 11868281 in words is "eleven million, eight hundred sixty-eight thousand, two hundred eighty-one".