118005281 has 2 divisors, whose sum is σ = 118005282. Its totient is φ = 118005280.

The previous prime is 118005259. The next prime is 118005299. The reversal of 118005281 is 182500811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96845281 + 21160000 = 9841^2 + 4600^2 .

It is an emirp because it is prime and its reverse (182500811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118005281 is a prime.

It is a super-2 number, since 2×118005281² = 27850492687777922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 118005281.

It is not a weakly prime, because it can be changed into another prime (118001281) 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, 59002640 + 59002641.

It is an arithmetic number, because the mean of its divisors is an integer number (59002641).

Almost surely, 2^118005281 is an apocalyptic number.

It is an amenable number.

118005281 is a deficient number, since it is larger than the sum of its proper divisors (1).

118005281 is an equidigital number, since it uses as much as digits as its factorization.

118005281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 118005281 is about 10863.0235662084. The cubic root of 118005281 is about 490.4941301643.

The spelling of 118005281 in words is "one hundred eighteen million, five thousand, two hundred eighty-one".