206455 has 8 divisors (see below), whose sum is σ = 250272. Its totient is φ = 163488.

The previous prime is 206447. The next prime is 206461. The reversal of 206455 is 554602.

206455 = T₁₀₂ + T₁₀₃ + ... + T₁₃₁.

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 206455 - 2³ = 206447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654 + ... + 916.

It is an arithmetic number, because the mean of its divisors is an integer number (31284).

2²⁰⁶⁴⁵⁵ is an apocalyptic number.

206455 is a deficient number, since it is larger than the sum of its proper divisors (43817).

206455 is a wasteful number, since it uses less digits than its factorization.

206455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 206455 is about 454.3731946319. The cubic root of 206455 is about 59.1028561105.

The spelling of 206455 in words is "two hundred six thousand, four hundred fifty-five".