816345 has 16 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 435312.

The previous prime is 816341. The next prime is 816353. The reversal of 816345 is 543618.

It is not a de Polignac number, because 816345 - 2² = 816341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (816341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2889 + ... + 3158.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2⁸¹⁶³⁴⁵ is an apocalyptic number.

It is an amenable number.

816345 is a deficient number, since it is larger than the sum of its proper divisors (635175).

816345 is a wasteful number, since it uses less digits than its factorization.

816345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061 (or 6055 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 816345 is about 903.5181237806. The cubic root of 816345 is about 93.4597422656.

The spelling of 816345 in words is "eight hundred sixteen thousand, three hundred forty-five".