116621 has 4 divisors (see below), whose sum is σ = 117600. Its totient is φ = 115644.

The previous prime is 116593. The next prime is 116639. The reversal of 116621 is 126611.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 116621 - 2¹⁰ = 115597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 116621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116681) 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, 281 + ... + 558.

It is an arithmetic number, because the mean of its divisors is an integer number (29400).

2¹¹⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

116621 is a deficient number, since it is larger than the sum of its proper divisors (979).

116621 is an equidigital number, since it uses as much as digits as its factorization.

116621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its digits is 72, while the sum is 17.

The square root of 116621 is about 341.4981698340. The cubic root of 116621 is about 48.8568639745.

It can be divided in two parts, 116 and 621, that added together give a palindrome (737).

The spelling of 116621 in words is "one hundred sixteen thousand, six hundred twenty-one".