1266747 has 4 divisors (see below), whose sum is σ = 1689000. Its totient is φ = 844496.

The previous prime is 1266743. The next prime is 1266751. The reversal of 1266747 is 7476621.

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

It is an interprime number because it is at equal distance from previous prime (1266743) and next prime (1266751).

It is a cyclic number.

It is not a de Polignac number, because 1266747 - 2² = 1266743 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1266743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211122 + ... + 211127.

It is an arithmetic number, because the mean of its divisors is an integer number (422250).

2^1266747 is an apocalyptic number.

1266747 is a deficient number, since it is larger than the sum of its proper divisors (422253).

1266747 is an equidigital number, since it uses as much as digits as its factorization.

1266747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422252.

The product of its digits is 14112, while the sum is 33.

The square root of 1266747 is about 1125.4985561963. The cubic root of 1266747 is about 108.2006728558.

The spelling of 1266747 in words is "one million, two hundred sixty-six thousand, seven hundred forty-seven".