16140805 has 4 divisors (see below), whose sum is σ = 19368972. Its totient is φ = 12912640.

The previous prime is 16140793. The next prime is 16140833. The reversal of 16140805 is 50804161.

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 2010724 + 14130081 = 1418^2 + 3759^2 .

It is not a de Polignac number, because 16140805 - 2²³ = 7752197 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 16140805.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1614076 + ... + 1614085.

It is an arithmetic number, because the mean of its divisors is an integer number (4842243).

Almost surely, 2^16140805 is an apocalyptic number.

It is an amenable number.

16140805 is a deficient number, since it is larger than the sum of its proper divisors (3228167).

16140805 is an equidigital number, since it uses as much as digits as its factorization.

16140805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228166.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 16140805 is about 4017.5620717047. The cubic root of 16140805 is about 252.7212321111.

Adding to 16140805 its reverse (50804161), we get a palindrome (66944966).

The spelling of 16140805 in words is "sixteen million, one hundred forty thousand, eight hundred five".