816534 has 16 divisors (see below), whose sum is σ = 1814640. Its totient is φ = 272160.

The previous prime is 816521. The next prime is 816539. The reversal of 816534 is 435618.

816534 is a `hidden beast` number, since 8 + 1 + 653 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 816498 and 816507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816539) 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 7 ways as a sum of consecutive naturals, for example, 7507 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (113415).

2⁸¹⁶⁵³⁴ is an apocalyptic number.

816534 is an abundant number, since it is smaller than the sum of its proper divisors (998106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816534 is a wasteful number, since it uses less digits than its factorization.

816534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15132 (or 15126 counting only the distinct ones).

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

The square root of 816534 is about 903.6227088780. The cubic root of 816534 is about 93.4669543014.

The spelling of 816534 in words is "eight hundred sixteen thousand, five hundred thirty-four".