999266 has 4 divisors (see below), whose sum is σ = 1498902. Its totient is φ = 499632.

The previous prime is 999239. The next prime is 999269. The reversal of 999266 is 662999.

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., 855625 + 143641 = 925^2 + 379^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999269) by changing a digit.

999266 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249815 + ... + 249818.

2⁹⁹⁹²⁶⁶ is an apocalyptic number.

999266 is a deficient number, since it is larger than the sum of its proper divisors (499636).

999266 is a wasteful number, since it uses less digits than its factorization.

999266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499635.

The product of its digits is 52488, while the sum is 41.

The square root of 999266 is about 999.6329326308. The cubic root of 999266 is about 99.9755273447.

The spelling of 999266 in words is "nine hundred ninety-nine thousand, two hundred sixty-six".