120618257 has 2 divisors, whose sum is σ = 120618258. Its totient is φ = 120618256.

The previous prime is 120618217. The next prime is 120618259. The reversal of 120618257 is 752816021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101687056 + 18931201 = 10084^2 + 4351^2 .

It is a cyclic number.

It is not a de Polignac number, because 120618257 - 2¹⁶ = 120552721 is a prime.

Together with 120618259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120618259) 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, 60309128 + 60309129.

It is an arithmetic number, because the mean of its divisors is an integer number (60309129).

Almost surely, 2^120618257 is an apocalyptic number.

It is an amenable number.

120618257 is a deficient number, since it is larger than the sum of its proper divisors (1).

120618257 is an equidigital number, since it uses as much as digits as its factorization.

120618257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 120618257 is about 10982.6343378991. The cubic root of 120618257 is about 494.0880491811.

The spelling of 120618257 in words is "one hundred twenty million, six hundred eighteen thousand, two hundred fifty-seven".