118921 has 8 divisors (see below), whose sum is σ = 136800. Its totient is φ = 102240.

The previous prime is 118913. The next prime is 118927. The reversal of 118921 is 129811.

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

It is a cyclic number.

It is not a de Polignac number, because 118921 - 2³ = 118913 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 118892 and 118901.

It is not an unprimeable number, because it can be changed into a prime (118927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (17100).

2¹¹⁸⁹²¹ is an apocalyptic number.

118921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118921 is a deficient number, since it is larger than the sum of its proper divisors (17879).

118921 is a wasteful number, since it uses less digits than its factorization.

118921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599.

The product of its digits is 144, while the sum is 22.

The square root of 118921 is about 344.8492424234. The cubic root of 118921 is about 49.1759604507.

The spelling of 118921 in words is "one hundred eighteen thousand, nine hundred twenty-one".