118242457 has 2 divisors, whose sum is σ = 118242458. Its totient is φ = 118242456.

The previous prime is 118242419. The next prime is 118242473. The reversal of 118242457 is 754242811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91087936 + 27154521 = 9544^2 + 5211^2 .

It is a cyclic number.

It is not a de Polignac number, because 118242457 - 2¹⁹ = 117718169 is a prime.

It is not a weakly prime, because it can be changed into another prime (118242557) 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, 59121228 + 59121229.

It is an arithmetic number, because the mean of its divisors is an integer number (59121229).

Almost surely, 2^118242457 is an apocalyptic number.

It is an amenable number.

118242457 is a deficient number, since it is larger than the sum of its proper divisors (1).

118242457 is an equidigital number, since it uses as much as digits as its factorization.

118242457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 34.

The square root of 118242457 is about 10873.9347524252. The cubic root of 118242457 is about 490.8225210723.

The spelling of 118242457 in words is "one hundred eighteen million, two hundred forty-two thousand, four hundred fifty-seven".