205495 has 8 divisors (see below), whose sum is σ = 250416. Its totient is φ = 161856.

The previous prime is 205493. The next prime is 205507. The reversal of 205495 is 594502.

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

It is a cyclic number.

It is not a de Polignac number, because 205495 - 2¹ = 205493 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (31302).

2²⁰⁵⁴⁹⁵ is an apocalyptic number.

205495 is a deficient number, since it is larger than the sum of its proper divisors (44921).

205495 is an equidigital number, since it uses as much as digits as its factorization.

205495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 205495 is about 453.3155633772. The cubic root of 205495 is about 59.0111058286.

Adding to 205495 its reverse (594502), we get a palindrome (799997).

It can be divided in two parts, 205 and 495, that multiplied together give a triangular number (101475 = T₄₅₀).

The spelling of 205495 in words is "two hundred five thousand, four hundred ninety-five".