266043 has 4 divisors (see below), whose sum is σ = 354728. Its totient is φ = 177360.

The previous prime is 266029. The next prime is 266047. The reversal of 266043 is 340662.

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

It is not a de Polignac number, because 266043 - 2⁴ = 266027 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266047) 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, 44338 + ... + 44343.

It is an arithmetic number, because the mean of its divisors is an integer number (88682).

2²⁶⁶⁰⁴³ is an apocalyptic number.

266043 is a deficient number, since it is larger than the sum of its proper divisors (88685).

266043 is an equidigital number, since it uses as much as digits as its factorization.

266043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88684.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 266043 is about 515.7935633565. The cubic root of 266043 is about 64.3157411755.

The spelling of 266043 in words is "two hundred sixty-six thousand, forty-three".