261106 has 4 divisors (see below), whose sum is σ = 391662. Its totient is φ = 130552.

The previous prime is 261101. The next prime is 261127. The reversal of 261106 is 601162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601162 = 2 ⋅300581.

It can be written as a sum of positive squares in only one way, i.e., 259081 + 2025 = 509^2 + 45^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261106.

It is not an unprimeable number, because it can be changed into a prime (261101) by changing a digit.

261106 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65275 + ... + 65278.

2²⁶¹¹⁰⁶ is an apocalyptic number.

261106 is a deficient number, since it is larger than the sum of its proper divisors (130556).

261106 is a wasteful number, since it uses less digits than its factorization.

261106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130555.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 261106 is about 510.9853226855. The cubic root of 261106 is about 63.9154156036.

Adding to 261106 its reverse (601162), we get a palindrome (862268).

The spelling of 261106 in words is "two hundred sixty-one thousand, one hundred six".