118121257 has 2 divisors, whose sum is σ = 118121258. Its totient is φ = 118121256.

The previous prime is 118121251. The next prime is 118121299. The reversal of 118121257 is 752121811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64304361 + 53816896 = 8019^2 + 7336^2 .

It is a cyclic number.

It is not a de Polignac number, because 118121257 - 2³ = 118121249 is a prime.

It is not a weakly prime, because it can be changed into another prime (118121251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59060628 + 59060629.

It is an arithmetic number, because the mean of its divisors is an integer number (59060629).

Almost surely, 2^118121257 is an apocalyptic number.

It is an amenable number.

118121257 is a deficient number, since it is larger than the sum of its proper divisors (1).

118121257 is an equidigital number, since it uses as much as digits as its factorization.

118121257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 28.

The square root of 118121257 is about 10868.3603639187. The cubic root of 118121257 is about 490.6547639969.

The spelling of 118121257 in words is "one hundred eighteen million, one hundred twenty-one thousand, two hundred fifty-seven".