205429 has 4 divisors (see below), whose sum is σ = 234784. Its totient is φ = 176076.

The previous prime is 205427. The next prime is 205433. The reversal of 205429 is 924502.

It is a happy number.

205429 is nontrivially palindromic in base 15.

205429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205429 - 2¹ = 205427 is a prime.

It is an Ulam number.

It is a Duffinian number.

205429 is a lucky number.

It is a congruent 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, 14667 + ... + 14680.

It is an arithmetic number, because the mean of its divisors is an integer number (58696).

2²⁰⁵⁴²⁹ is an apocalyptic number.

It is an amenable number.

205429 is a deficient number, since it is larger than the sum of its proper divisors (29355).

205429 is an equidigital number, since it uses as much as digits as its factorization.

205429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29354.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 205429 is about 453.2427605599. The cubic root of 205429 is about 59.0047875077.

The spelling of 205429 in words is "two hundred five thousand, four hundred twenty-nine".