116721 has 20 divisors (see below), whose sum is σ = 191664.
Its totient is φ = 70200.
The previous prime is 116719. The next prime is 116731. The reversal of 116721 is 127611.
It is not a de Polignac number, because 116721 - 21 = 116719 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 116694 and 116703.
It is not an unprimeable number, because it can be changed into a prime (116731) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 826 + ... + 956.
2116721 is an apocalyptic number.
116721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
116721 is a deficient number, since it is larger than the sum of its proper divisors (74943).
116721 is a wasteful number, since it uses less digits than its factorization.
116721 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 154 (or 145 counting only the distinct ones).
The product of its digits is 84, while the sum is 18.
The square root of 116721 is about 341.6445521298.
The cubic root of 116721 is about 48.8708245550.
The spelling of 116721 in words is "one hundred sixteen thousand, seven hundred twenty-one".