116921 has 4 divisors (see below), whose sum is σ = 133632. Its totient is φ = 100212.

The previous prime is 116911. The next prime is 116923. The reversal of 116921 is 129611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 116921 - 2¹⁴ = 100537 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 116893 and 116902.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 116921.

It is not an unprimeable number, because it can be changed into a prime (116923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8345 + ... + 8358.

It is an arithmetic number, because the mean of its divisors is an integer number (33408).

2¹¹⁶⁹²¹ is an apocalyptic number.

It is an amenable number.

116921 is a deficient number, since it is larger than the sum of its proper divisors (16711).

116921 is an equidigital number, since it uses as much as digits as its factorization.

116921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16710.

The product of its digits is 108, while the sum is 20.

The square root of 116921 is about 341.9371287240. The cubic root of 116921 is about 48.8987218131.

The spelling of 116921 in words is "one hundred sixteen thousand, nine hundred twenty-one".