266241 has 4 divisors (see below), whose sum is σ = 354992. Its totient is φ = 177492.

The previous prime is 266239. The next prime is 266261. The reversal of 266241 is 142662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 266241 - 2¹ = 266239 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266241.

It is not an unprimeable number, because it can be changed into a prime (266221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44371 + ... + 44376.

It is an arithmetic number, because the mean of its divisors is an integer number (88748).

It is a Proth number, since it is equal to 65 ⋅ 2¹² + 1 and 65 < 2¹².

2²⁶⁶²⁴¹ is an apocalyptic number.

It is an amenable number.

266241 is a deficient number, since it is larger than the sum of its proper divisors (88751).

266241 is an equidigital number, since it uses as much as digits as its factorization.

266241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88750.

The product of its digits is 576, while the sum is 21.

The square root of 266241 is about 515.9854649116. The cubic root of 266241 is about 64.3316926807.

The spelling of 266241 in words is "two hundred sixty-six thousand, two hundred forty-one".