1266811 has 8 divisors (see below), whose sum is σ = 1559264. Its totient is φ = 1002240.

The previous prime is 1266799. The next prime is 1266841. The reversal of 1266811 is 1186621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266811 - 2⁵ = 1266779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6870 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (194908).

2^1266811 is an apocalyptic number.

1266811 is a deficient number, since it is larger than the sum of its proper divisors (292453).

1266811 is a wasteful number, since it uses less digits than its factorization.

1266811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13941.

The product of its digits is 576, while the sum is 25.

The square root of 1266811 is about 1125.5269876818. The cubic root of 1266811 is about 108.2024950367.

The spelling of 1266811 in words is "one million, two hundred sixty-six thousand, eight hundred eleven".