858434 has 4 divisors (see below), whose sum is σ = 1287654. Its totient is φ = 429216.

The previous prime is 858433. The next prime is 858457. The reversal of 858434 is 434858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434858 = 2 ⋅217429.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 2809 = 925^2 + 53^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 858434.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 858434.

It is not an unprimeable number, because it can be changed into a prime (858433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214607 + ... + 214610.

2⁸⁵⁸⁴³⁴ is an apocalyptic number.

858434 is a deficient number, since it is larger than the sum of its proper divisors (429220).

858434 is a wasteful number, since it uses less digits than its factorization.

858434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429219.

The product of its digits is 15360, while the sum is 32.

The square root of 858434 is about 926.5171342183. The cubic root of 858434 is about 95.0390974805.

The spelling of 858434 in words is "eight hundred fifty-eight thousand, four hundred thirty-four".