120281729 has 2 divisors, whose sum is σ = 120281730. Its totient is φ = 120281728.

The previous prime is 120281719. The next prime is 120281731. The reversal of 120281729 is 927182021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91680625 + 28601104 = 9575^2 + 5348^2 .

It is a cyclic number.

It is not a de Polignac number, because 120281729 - 2⁴ = 120281713 is a prime.

It is a Sophie Germain prime.

Together with 120281731, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120281695 and 120281704.

It is not a weakly prime, because it can be changed into another prime (120281719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60140864 + 60140865.

It is an arithmetic number, because the mean of its divisors is an integer number (60140865).

Almost surely, 2^120281729 is an apocalyptic number.

It is an amenable number.

120281729 is a deficient number, since it is larger than the sum of its proper divisors (1).

120281729 is an equidigital number, since it uses as much as digits as its factorization.

120281729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 120281729 is about 10967.3027221829. The cubic root of 120281729 is about 493.6281151049.

The spelling of 120281729 in words is "one hundred twenty million, two hundred eighty-one thousand, seven hundred twenty-nine".