261206 has 16 divisors (see below), whose sum is σ = 442368. Its totient is φ = 114600.

The previous prime is 261169. The next prime is 261223. The reversal of 261206 is 602162.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (27648).

2²⁶¹²⁰⁶ is an apocalyptic number.

261206 is a deficient number, since it is larger than the sum of its proper divisors (181162).

261206 is a wasteful number, since it uses less digits than its factorization.

261206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 261206 is about 511.0831634871. The cubic root of 261206 is about 63.9235741367.

Adding to 261206 its reverse (602162), we get a palindrome (863368).

The spelling of 261206 in words is "two hundred sixty-one thousand, two hundred six".