817434 has 12 divisors (see below), whose sum is σ = 1771146. Its totient is φ = 272472.

The previous prime is 817433. The next prime is 817457. The reversal of 817434 is 434718.

817434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 815409 + 2025 = 903^2 + 45^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 817398 and 817407.

It is not an unprimeable number, because it can be changed into a prime (817433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22689 + ... + 22724.

2⁸¹⁷⁴³⁴ is an apocalyptic number.

817434 is an abundant number, since it is smaller than the sum of its proper divisors (953712).

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

817434 is a wasteful number, since it uses less digits than its factorization.

817434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45421 (or 45418 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 817434 is about 904.1205671812. The cubic root of 817434 is about 93.5012820704.

The spelling of 817434 in words is "eight hundred seventeen thousand, four hundred thirty-four".