122705281 has 2 divisors, whose sum is σ = 122705282. Its totient is φ = 122705280.

The previous prime is 122705263. The next prime is 122705321. The reversal of 122705281 is 182507221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 58384881 = 8020^2 + 7641^2 .

It is a cyclic number.

It is not a de Polignac number, because 122705281 - 2⁷ = 122705153 is a prime.

It is a super-2 number, since 2×122705281² = 30113171970577922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122705381) 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, 61352640 + 61352641.

It is an arithmetic number, because the mean of its divisors is an integer number (61352641).

Almost surely, 2^122705281 is an apocalyptic number.

It is an amenable number.

122705281 is a deficient number, since it is larger than the sum of its proper divisors (1).

122705281 is an equidigital number, since it uses as much as digits as its factorization.

122705281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 122705281 is about 11077.2415790214. The cubic root of 122705281 is about 496.9214587362.

The spelling of 122705281 in words is "one hundred twenty-two million, seven hundred five thousand, two hundred eighty-one".