208261 has 2 divisors, whose sum is σ = 208262. Its totient is φ = 208260.

The previous prime is 208253. The next prime is 208277. The reversal of 208261 is 162802.

It is a happy number.

208261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185761 + 22500 = 431^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 208261 - 2³ = 208253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104130 + 104131.

It is an arithmetic number, because the mean of its divisors is an integer number (104131).

2²⁰⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

208261 is a deficient number, since it is larger than the sum of its proper divisors (1).

208261 is an equidigital number, since it uses as much as digits as its factorization.

208261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 208261 is about 456.3562205120. The cubic root of 208261 is about 59.2746934287.

It can be divided in two parts, 20 and 8261, that added together give a square (8281 = 91²).

The spelling of 208261 in words is "two hundred eight thousand, two hundred sixty-one".