1266864 has 20 divisors (see below), whose sum is σ = 3272856. Its totient is φ = 422272.

The previous prime is 1266851. The next prime is 1266869. The reversal of 1266864 is 4686621.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1266869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13149 + ... + 13244.

2^1266864 is an apocalyptic number.

It is an amenable number.

1266864 is an abundant number, since it is smaller than the sum of its proper divisors (2005992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266864 is a wasteful number, since it uses less digits than its factorization.

1266864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26404 (or 26398 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 1266864 is about 1125.5505319620. The cubic root of 1266864 is about 108.2040039837.

The spelling of 1266864 in words is "one million, two hundred sixty-six thousand, eight hundred sixty-four".