206426 has 12 divisors (see below), whose sum is σ = 340746. Its totient is φ = 93720.

The previous prime is 206419. The next prime is 206447. The reversal of 206426 is 624602.

206426 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., 203401 + 3025 = 451^2 + 55^2 .

It is a super-2 number, since 2×206426² = 85223386952, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 206398 and 206407.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 185 + ... + 668.

2²⁰⁶⁴²⁶ is an apocalyptic number.

206426 is a deficient number, since it is larger than the sum of its proper divisors (134320).

206426 is a wasteful number, since it uses less digits than its factorization.

206426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 206426 is about 454.3412814174. The cubic root of 206426 is about 59.1000886582.

It can be divided in two parts, 20 and 6426, that added together give a palindrome (6446).

The spelling of 206426 in words is "two hundred six thousand, four hundred twenty-six".