118641181 has 8 divisors (see below), whose sum is σ = 125804664. Its totient is φ = 111498240.

The previous prime is 118641169. The next prime is 118641197. The reversal of 118641181 is 181146811.

It can be written as a sum of positive squares in 4 ways, for example, as 64545156 + 54096025 = 8034^2 + 7355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118641181 - 2⁷ = 118641053 is a prime.

It is a super-2 number, since 2×118641181² = 28151459658149522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118641161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7701 + ... + 17221.

It is an arithmetic number, because the mean of its divisors is an integer number (15725583).

Almost surely, 2^118641181 is an apocalyptic number.

It is an amenable number.

118641181 is a deficient number, since it is larger than the sum of its proper divisors (7163483).

118641181 is an equidigital number, since it uses as much as digits as its factorization.

118641181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271.

The product of its digits is 1536, while the sum is 31.

The square root of 118641181 is about 10892.2532563286. The cubic root of 118641181 is about 491.3736010578.

Adding to 118641181 its reverse (181146811), we get a palindrome (299787992).

The spelling of 118641181 in words is "one hundred eighteen million, six hundred forty-one thousand, one hundred eighty-one".