1266963 has 4 divisors (see below), whose sum is σ = 1689288. Its totient is φ = 844640.

The previous prime is 1266953. The next prime is 1267009. The reversal of 1266963 is 3696621.

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 1266963 - 2⁵ = 1266931 is a prime.

It is a D-number.

1266963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1266913) 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, 211158 + ... + 211163.

It is an arithmetic number, because the mean of its divisors is an integer number (422322).

2^1266963 is an apocalyptic number.

1266963 is a deficient number, since it is larger than the sum of its proper divisors (422325).

1266963 is an equidigital number, since it uses as much as digits as its factorization.

1266963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422324.

The product of its digits is 11664, while the sum is 33.

The square root of 1266963 is about 1125.5945095815. The cubic root of 1266963 is about 108.2068224703.

The spelling of 1266963 in words is "one million, two hundred sixty-six thousand, nine hundred sixty-three".