1266423 has 4 divisors (see below), whose sum is σ = 1688568. Its totient is φ = 844280.

The previous prime is 1266413. The next prime is 1266431. The reversal of 1266423 is 3246621.

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 1266423 - 2⁶ = 1266359 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1266393 and 1266402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211068 + ... + 211073.

It is an arithmetic number, because the mean of its divisors is an integer number (422142).

2^1266423 is an apocalyptic number.

1266423 is a deficient number, since it is larger than the sum of its proper divisors (422145).

1266423 is an equidigital number, since it uses as much as digits as its factorization.

1266423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422144.

The product of its digits is 1728, while the sum is 24.

The square root of 1266423 is about 1125.3546107783. The cubic root of 1266423 is about 108.1914471232.

The spelling of 1266423 in words is "one million, two hundred sixty-six thousand, four hundred twenty-three".