205426 has 8 divisors (see below), whose sum is σ = 331884. Its totient is φ = 94800.

The previous prime is 205423. The next prime is 205427. The reversal of 205426 is 624502.

It can be written as a sum of positive squares in 2 ways, for example, as 203401 + 2025 = 451^2 + 45^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (205421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3925 + ... + 3976.

2²⁰⁵⁴²⁶ is an apocalyptic number.

205426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

205426 is a deficient number, since it is larger than the sum of its proper divisors (126458).

205426 is a wasteful number, since it uses less digits than its factorization.

205426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7916.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 205426 is about 453.2394510631. The cubic root of 205426 is about 59.0045002792.

Adding to 205426 its reverse (624502), we get a palindrome (829928).

It can be divided in two parts, 2054 and 26, that added together give a triangular number (2080 = T₆₄).

The spelling of 205426 in words is "two hundred five thousand, four hundred twenty-six".