266541 has 16 divisors (see below), whose sum is σ = 399168. Its totient is φ = 156800.

The previous prime is 266521. The next prime is 266549. The reversal of 266541 is 145662.

It is a cyclic number.

It is not a de Polignac number, because 266541 - 2⁶ = 266477 is a prime.

It is a super-4 number, since 4×266541⁴ (a number of 23 digits) contains 4444 as substring.

It is a plaindrome in base 9.

It is a nialpdrome in base 13.

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 266541.

It is not an unprimeable number, because it can be changed into a prime (266549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2²⁶⁶⁵⁴¹ is an apocalyptic number.

It is an amenable number.

266541 is a deficient number, since it is larger than the sum of its proper divisors (132627).

266541 is a wasteful number, since it uses less digits than its factorization.

266541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its digits is 1440, while the sum is 24.

The square root of 266541 is about 516.2760889292. The cubic root of 266541 is about 64.3558465657.

The spelling of 266541 in words is "two hundred sixty-six thousand, five hundred forty-one".