116421161 has 4 divisors (see below), whose sum is σ = 116841732. Its totient is φ = 116000592.

The previous prime is 116421139. The next prime is 116421163. The reversal of 116421161 is 161124611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161124611 = 53 ⋅3040087.

It can be written as a sum of positive squares in 2 ways, for example, as 35331136 + 81090025 = 5944^2 + 9005^2 .

It is a cyclic number.

It is not a de Polignac number, because 116421161 - 2¹⁰ = 116420137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116421163) 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 3 ways as a sum of consecutive naturals, for example, 209870 + ... + 210423.

It is an arithmetic number, because the mean of its divisors is an integer number (29210433).

Almost surely, 2^116421161 is an apocalyptic number.

It is an amenable number.

116421161 is a deficient number, since it is larger than the sum of its proper divisors (420571).

116421161 is an equidigital number, since it uses as much as digits as its factorization.

116421161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420570.

The product of its digits is 288, while the sum is 23.

The square root of 116421161 is about 10789.8638082230. The cubic root of 116421161 is about 488.2894136192.

Adding to 116421161 its reverse (161124611), we get a palindrome (277545772).

The spelling of 116421161 in words is "one hundred sixteen million, four hundred twenty-one thousand, one hundred sixty-one".