816115 has 4 divisors (see below), whose sum is σ = 979344. Its totient is φ = 652888.

The previous prime is 816113. The next prime is 816121. The reversal of 816115 is 511618.

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

It is a cyclic number.

It is not a de Polignac number, because 816115 - 2¹ = 816113 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

816115 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (816113) 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, 81607 + ... + 81616.

It is an arithmetic number, because the mean of its divisors is an integer number (244836).

2⁸¹⁶¹¹⁵ is an apocalyptic number.

816115 is a deficient number, since it is larger than the sum of its proper divisors (163229).

816115 is a wasteful number, since it uses less digits than its factorization.

816115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163228.

The product of its digits is 240, while the sum is 22.

The square root of 816115 is about 903.3908345783. The cubic root of 816115 is about 93.4509642122.

The spelling of 816115 in words is "eight hundred sixteen thousand, one hundred fifteen".