266395 has 4 divisors (see below), whose sum is σ = 319680. Its totient is φ = 213112.

The previous prime is 266381. The next prime is 266401. The reversal of 266395 is 593662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 593662 = 2 ⋅296831.

It is a cyclic number.

It is not a de Polignac number, because 266395 - 2⁹ = 265883 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

266395 is a lucky number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 26635 + ... + 26644.

It is an arithmetic number, because the mean of its divisors is an integer number (79920).

2²⁶⁶³⁹⁵ is an apocalyptic number.

266395 is a deficient number, since it is larger than the sum of its proper divisors (53285).

266395 is an equidigital number, since it uses as much as digits as its factorization.

266395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53284.

The product of its digits is 9720, while the sum is 31.

The square root of 266395 is about 516.1346723482. The cubic root of 266395 is about 64.3440939401.

The spelling of 266395 in words is "two hundred sixty-six thousand, three hundred ninety-five".