266249 has 4 divisors (see below), whose sum is σ = 275460. Its totient is φ = 257040.

The previous prime is 266239. The next prime is 266261. The reversal of 266249 is 942662.

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 156025 + 110224 = 395^2 + 332^2 .

It is a cyclic number.

It is not a de Polignac number, because 266249 - 2¹² = 262153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 9181 = 266249 / (2 + 6 + 6 + 2 + 4 + 9).

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 266249.

It is not an unprimeable number, because it can be changed into a prime (266239) 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, 4562 + ... + 4619.

It is an arithmetic number, because the mean of its divisors is an integer number (68865).

2²⁶⁶²⁴⁹ is an apocalyptic number.

266249 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

266249 is a deficient number, since it is larger than the sum of its proper divisors (9211).

266249 is an equidigital number, since it uses as much as digits as its factorization.

266249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9210.

The product of its digits is 5184, while the sum is 29.

The square root of 266249 is about 515.9932170097. The cubic root of 266249 is about 64.3323370197.

It can be divided in two parts, 266 and 249, that added together give a palindrome (515).

The spelling of 266249 in words is "two hundred sixty-six thousand, two hundred forty-nine".