266842 has 8 divisors (see below), whose sum is σ = 404532. Its totient is φ = 132000.

The previous prime is 266839. The next prime is 266863. The reversal of 266842 is 248662.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 72361 = 441^2 + 269^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 266842.

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, 459 + ... + 862.

2²⁶⁶⁸⁴² is an apocalyptic number.

266842 is a deficient number, since it is larger than the sum of its proper divisors (137690).

266842 is a wasteful number, since it uses less digits than its factorization.

266842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its digits is 4608, while the sum is 28.

The square root of 266842 is about 516.5675173683. The cubic root of 266842 is about 64.3800627558.

The spelling of 266842 in words is "two hundred sixty-six thousand, eight hundred forty-two".