120551161 has 2 divisors, whose sum is σ = 120551162. Its totient is φ = 120551160.

The previous prime is 120551153. The next prime is 120551177. The reversal of 120551161 is 161155021.

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., 100881936 + 19669225 = 10044^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 120551161 - 2³ = 120551153 is a prime.

It is not a weakly prime, because it can be changed into another prime (120551141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60275580 + 60275581.

It is an arithmetic number, because the mean of its divisors is an integer number (60275581).

Almost surely, 2^120551161 is an apocalyptic number.

It is an amenable number.

120551161 is a deficient number, since it is larger than the sum of its proper divisors (1).

120551161 is an equidigital number, since it uses as much as digits as its factorization.

120551161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 120551161 is about 10979.5792724494. The cubic root of 120551161 is about 493.9964171693.

The spelling of 120551161 in words is "one hundred twenty million, five hundred fifty-one thousand, one hundred sixty-one".