Adding to 261101 its reverse (101162), we get a palindrome (362263).
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-261101 is a prime.
It is a Chen prime.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261101.
2261101 is an apocalyptic number.
It is an amenable number.
261101 is an equidigital number, since it uses as much as digits as its factorization.
261101 is an odious number, because the sum of its binary digits is odd.
The square root of 261101 is about 510.9804301536. The cubic root of 261101 is about 63.9150076223.
The spelling of 261101 in words is "two hundred sixty-one thousand, one hundred one".