816854 has 4 divisors (see below), whose sum is σ = 1225284. Its totient is φ = 408426.

The previous prime is 816847. The next prime is 816857. The reversal of 816854 is 458618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458618 = 2 ⋅229309.

It is a self number, because there is not a number n which added to its sum of digits gives 816854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204212 + ... + 204215.

It is an arithmetic number, because the mean of its divisors is an integer number (306321).

2⁸¹⁶⁸⁵⁴ is an apocalyptic number.

816854 is a deficient number, since it is larger than the sum of its proper divisors (408430).

816854 is a wasteful number, since it uses less digits than its factorization.

816854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408429.

The product of its digits is 7680, while the sum is 32.

The square root of 816854 is about 903.7997565833. The cubic root of 816854 is about 93.4791626190.

The spelling of 816854 in words is "eight hundred sixteen thousand, eight hundred fifty-four".