118791257 has 16 divisors (see below), whose sum is σ = 135862272. Its totient is φ = 102892800.

The previous prime is 118791229. The next prime is 118791263. The reversal of 118791257 is 752197811.

It is a cyclic number.

It is not a de Polignac number, because 118791257 - 2¹⁶ = 118725721 is a prime.

It is a super-2 number, since 2×118791257² = 28222725479280098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118791457) 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 in 15 ways as a sum of consecutive naturals, for example, 102632 + ... + 103782.

It is an arithmetic number, because the mean of its divisors is an integer number (8491392).

Almost surely, 2^118791257 is an apocalyptic number.

118791257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

118791257 is a deficient number, since it is larger than the sum of its proper divisors (17071015).

118791257 is a wasteful number, since it uses less digits than its factorization.

118791257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648.

The product of its digits is 35280, while the sum is 41.

The square root of 118791257 is about 10899.1401954466. The cubic root of 118791257 is about 491.5807025934.

The spelling of 118791257 in words is "one hundred eighteen million, seven hundred ninety-one thousand, two hundred fifty-seven".