261208 has 16 divisors (see below), whose sum is σ = 496080. Its totient is φ = 128928.

The previous prime is 261169. The next prime is 261223. The reversal of 261208 is 802162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

261208 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666 + ... + 982.

It is an arithmetic number, because the mean of its divisors is an integer number (31005).

2²⁶¹²⁰⁸ is an apocalyptic number.

It is an amenable number.

261208 is a deficient number, since it is larger than the sum of its proper divisors (234872).

261208 is a wasteful number, since it uses less digits than its factorization.

261208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 422 counting only the distinct ones).

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

The square root of 261208 is about 511.0851201121. The cubic root of 261208 is about 63.9237372861.

The spelling of 261208 in words is "two hundred sixty-one thousand, two hundred eight".