206120 has 16 divisors (see below), whose sum is σ = 463860. Its totient is φ = 82432.

The previous prime is 206083. The next prime is 206123. The reversal of 206120 is 21602.

It can be written as a sum of positive squares in 2 ways, for example, as 206116 + 4 = 454^2 + 2^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (206123) by changing a digit.

206120 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2537 + ... + 2616.

2²⁰⁶¹²⁰ is an apocalyptic number.

206120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206120 is an abundant number, since it is smaller than the sum of its proper divisors (257740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206120 is a wasteful number, since it uses less digits than its factorization.

206120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164 (or 5160 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 206120 is about 454.0044052650. The cubic root of 206120 is about 59.0708714560.

Adding to 206120 its reverse (21602), we get a palindrome (227722).

The spelling of 206120 in words is "two hundred six thousand, one hundred twenty".