26261 has 2 divisors, whose sum is σ = 26262.
Its totient is φ = 26260.
The previous prime is 26251. The next prime is 26263. The reversal of 26261 is 16262.
Subtracting from 26261 its sum of digits (17), we obtain a square (26244 = 1622).
Subtracting from 26261 its reverse (16262), we obtain a palindrome (9999).
It can be divided in two parts, 262 and 61, that added together give a palindrome (323).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 14161 + 12100 = 119^2 + 110^2
It is a cyclic number.
It is not a de Polignac number, because 26261 - 210 = 25237 is a prime.
Together with 26263, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (26263) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130 + 13131.
It is an arithmetic number, because the mean of its divisors is an integer number (13131).
226261 is an apocalyptic number.
It is an amenable number.
26261 is a deficient number, since it is larger than the sum of its proper divisors (1).
26261 is an equidigital number, since it uses as much as digits as its factorization.
26261 is an evil number, because the sum of its binary digits is even.
The product of its digits is 144, while the sum is 17.
The square root of 26261 is about 162.0524606416.
The cubic root of 26261 is about 29.7237604947.
The spelling of 26261 in words is "twenty-six thousand, two hundred sixty-one".