120648257 has 2 divisors, whose sum is σ = 120648258. Its totient is φ = 120648256.

The previous prime is 120648223. The next prime is 120648289. The reversal of 120648257 is 752846021.

It is a Cunningham number, because it is equal to 10984²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120648256 + 1 = 10984^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 120648257 - 2¹⁴ = 120631873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120618257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60324128 + 60324129.

It is an arithmetic number, because the mean of its divisors is an integer number (60324129).

Almost surely, 2^120648257 is an apocalyptic number.

It is an amenable number.

120648257 is a deficient number, since it is larger than the sum of its proper divisors (1).

120648257 is an equidigital number, since it uses as much as digits as its factorization.

120648257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 120648257 is about 10984.0000455208. Note that the first 4 decimals coincide. The cubic root of 120648257 is about 494.1290087426.

The spelling of 120648257 in words is "one hundred twenty million, six hundred forty-eight thousand, two hundred fifty-seven".