1266011 has 4 divisors (see below), whose sum is σ = 1289952. Its totient is φ = 1242072.

The previous prime is 1265993. The next prime is 1266019. The reversal of 1266011 is 1106621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1266011 - 2¹⁴ = 1249627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266019) 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, 11891 + ... + 11996.

It is an arithmetic number, because the mean of its divisors is an integer number (322488).

2^1266011 is an apocalyptic number.

1266011 is a deficient number, since it is larger than the sum of its proper divisors (23941).

1266011 is an equidigital number, since it uses as much as digits as its factorization.

1266011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23940.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1266011 is about 1125.1715424770. The cubic root of 1266011 is about 108.1797133631.

The spelling of 1266011 in words is "one million, two hundred sixty-six thousand, eleven".