1266123 has 4 divisors (see below), whose sum is σ = 1688168. Its totient is φ = 844080.

The previous prime is 1266113. The next prime is 1266149. The reversal of 1266123 is 3216621.

It is a happy number.

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

It is not a de Polignac number, because 1266123 - 2⁴ = 1266107 is a prime.

It is a super-2 number, since 2×1266123² = 3206134902258, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266123.

It is not an unprimeable number, because it can be changed into a prime (1266113) 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, 211018 + ... + 211023.

It is an arithmetic number, because the mean of its divisors is an integer number (422042).

2^1266123 is an apocalyptic number.

1266123 is a deficient number, since it is larger than the sum of its proper divisors (422045).

1266123 is an equidigital number, since it uses as much as digits as its factorization.

1266123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422044.

The product of its digits is 432, while the sum is 21.

The square root of 1266123 is about 1125.2213115650. The cubic root of 1266123 is about 108.1829033751.

The spelling of 1266123 in words is "one million, two hundred sixty-six thousand, one hundred twenty-three".