3999266 has 4 divisors (see below), whose sum is σ = 5998902. Its totient is φ = 1999632.

The previous prime is 3999251. The next prime is 3999283. The reversal of 3999266 is 6629993.

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., 3822025 + 177241 = 1955^2 + 421^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999815 + ... + 999818.

Almost surely, 2^3999266 is an apocalyptic number.

3999266 is a deficient number, since it is larger than the sum of its proper divisors (1999636).

3999266 is a wasteful number, since it uses less digits than its factorization.

3999266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999635.

The product of its digits is 157464, while the sum is 44.

The square root of 3999266 is about 1999.8164915812. The cubic root of 3999266 is about 158.7303949998.

The spelling of 3999266 in words is "three million, nine hundred ninety-nine thousand, two hundred sixty-six".