26281 has 4 divisors (see below), whose sum is σ = 26964. Its totient is φ = 25600.

The previous prime is 26267. The next prime is 26293. The reversal of 26281 is 18262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11881 + 14400 = 109^2 + 120^2 .

It is a 4-Lehmer number, since φ(26281) divides (26281-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 26281 - 2⁵ = 26249 is a prime.

It is a super-2 number, since 2×26281² = 1381381922, which contains 22 as substring.

It is a Duffinian number.

26281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (26251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280 + ... + 361.

It is an arithmetic number, because the mean of its divisors is an integer number (6741).

2²⁶²⁸¹ is an apocalyptic number.

26281 is the 73-rd centered decagonal number.

It is an amenable number.

26281 is a deficient number, since it is larger than the sum of its proper divisors (683).

26281 is an equidigital number, since it uses as much as digits as its factorization.

26281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

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

The square root of 26281 is about 162.1141573090. The cubic root of 26281 is about 29.7313043094.

Subtracting from 26281 its sum of digits (19), we obtain a palindrome (26262).

It can be divided in two parts, 262 and 81, that added together give a palindrome (343).

The spelling of 26281 in words is "twenty-six thousand, two hundred eighty-one".