105285281 has 2 divisors, whose sum is σ = 105285282. Its totient is φ = 105285280.

The previous prime is 105285277. The next prime is 105285287. The reversal of 105285281 is 182582501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91853056 + 13432225 = 9584^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 105285281 - 2² = 105285277 is a prime.

It is a super-2 number, since 2×105285281² = 22169980790497922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105285287) 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, 52642640 + 52642641.

It is an arithmetic number, because the mean of its divisors is an integer number (52642641).

Almost surely, 2^105285281 is an apocalyptic number.

It is an amenable number.

105285281 is a deficient number, since it is larger than the sum of its proper divisors (1).

105285281 is an equidigital number, since it uses as much as digits as its factorization.

105285281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 105285281 is about 10260.8616109954. The cubic root of 105285281 is about 472.1962714925.

The spelling of 105285281 in words is "one hundred five million, two hundred eighty-five thousand, two hundred eighty-one".