2691266 has 4 divisors (see below), whose sum is σ = 4036902. Its totient is φ = 1345632.

The previous prime is 2691251. The next prime is 2691277. The reversal of 2691266 is 6621962.

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., 2493241 + 198025 = 1579^2 + 445^2 .

It is a nialpdrome in base 12.

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 as a sum of consecutive naturals, namely, 672815 + ... + 672818.

2^2691266 is an apocalyptic number.

2691266 is a deficient number, since it is larger than the sum of its proper divisors (1345636).

2691266 is a wasteful number, since it uses less digits than its factorization.

2691266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345635.

The product of its digits is 7776, while the sum is 32.

The square root of 2691266 is about 1640.5078481982. The cubic root of 2691266 is about 139.0973560145.

It can be divided in two parts, 2691 and 266, that multiplied together give a triangular number (715806 = T₁₁₉₆).

The spelling of 2691266 in words is "two million, six hundred ninety-one thousand, two hundred sixty-six".