816365 has 8 divisors (see below), whose sum is σ = 1068768. Its totient is φ = 593680.

The previous prime is 816353. The next prime is 816367. The reversal of 816365 is 563618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816365 - 2¹⁰ = 815341 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7367 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (133596).

2⁸¹⁶³⁶⁵ is an apocalyptic number.

It is an amenable number.

816365 is a deficient number, since it is larger than the sum of its proper divisors (252403).

816365 is a wasteful number, since it uses less digits than its factorization.

816365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14859.

The product of its digits is 4320, while the sum is 29.

The square root of 816365 is about 903.5291915594. The cubic root of 816365 is about 93.4605054966.

It can be divided in two parts, 8163 and 65, that added together give a palindrome (8228).

The spelling of 816365 in words is "eight hundred sixteen thousand, three hundred sixty-five".