118281261 has 16 divisors (see below), whose sum is σ = 184431104. Its totient is φ = 66016944.

The previous prime is 118281239. The next prime is 118281263. The reversal of 118281261 is 162182811.

It is a happy number.

It is not a de Polignac number, because 118281261 - 2¹⁴ = 118264877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118281263) 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, 64591 + ... + 66396.

It is an arithmetic number, because the mean of its divisors is an integer number (11526944).

Almost surely, 2^118281261 is an apocalyptic number.

It is an amenable number.

118281261 is a deficient number, since it is larger than the sum of its proper divisors (66149843).

118281261 is a wasteful number, since it uses less digits than its factorization.

118281261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131040.

The product of its digits is 1536, while the sum is 30.

The square root of 118281261 is about 10875.7188727918. The cubic root of 118281261 is about 490.8762067915.

The spelling of 118281261 in words is "one hundred eighteen million, two hundred eighty-one thousand, two hundred sixty-one".