266242 has 4 divisors (see below), whose sum is σ = 399366. Its totient is φ = 133120.

The previous prime is 266239. The next prime is 266261. The reversal of 266242 is 242662.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 151321 + 114921 = 389^2 + 339^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 66559 + ... + 66562.

2²⁶⁶²⁴² is an apocalyptic number.

266242 is a deficient number, since it is larger than the sum of its proper divisors (133124).

266242 is a wasteful number, since it uses less digits than its factorization.

266242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133123.

The product of its digits is 1152, while the sum is 22.

The square root of 266242 is about 515.9864339302. The cubic root of 266242 is about 64.3317732238.

It can be divided in two parts, 2662 and 42, that added together give a square (2704 = 52²).

The spelling of 266242 in words is "two hundred sixty-six thousand, two hundred forty-two".