116506405 has 4 divisors (see below), whose sum is σ = 139807692. Its totient is φ = 93205120.

The previous prime is 116506387. The next prime is 116506417. The reversal of 116506405 is 504605611.

116506405 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53684929 + 62821476 = 7327^2 + 7926^2 .

It is a de Polignac number, because none of the positive numbers 2^k-116506405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11650636 + ... + 11650645.

It is an arithmetic number, because the mean of its divisors is an integer number (34951923).

Almost surely, 2^116506405 is an apocalyptic number.

It is an amenable number.

116506405 is a deficient number, since it is larger than the sum of its proper divisors (23301287).

116506405 is an equidigital number, since it uses as much as digits as its factorization.

116506405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23301286.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 116506405 is about 10793.8132742789. The cubic root of 116506405 is about 488.4085603090.

It can be divided in two parts, 116 and 506405, that added together give a triangular number (506521 = T₁₀₀₆).

The spelling of 116506405 in words is "one hundred sixteen million, five hundred six thousand, four hundred five".