1266533 has 4 divisors (see below), whose sum is σ = 1274028. Its totient is φ = 1259040.

The previous prime is 1266527. The next prime is 1266539. The reversal of 1266533 is 3356621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3356621 = 829 ⋅4049.

It is an interprime number because it is at equal distance from previous prime (1266527) and next prime (1266539).

It can be written as a sum of positive squares in 2 ways, for example, as 452929 + 813604 = 673^2 + 902^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266533 - 2⁶ = 1266469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266539) 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, 3488 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (318507).

2^1266533 is an apocalyptic number.

It is an amenable number.

1266533 is a deficient number, since it is larger than the sum of its proper divisors (7495).

1266533 is an equidigital number, since it uses as much as digits as its factorization.

1266533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494.

The product of its digits is 3240, while the sum is 26.

The square root of 1266533 is about 1125.4034832006. The cubic root of 1266533 is about 108.1945794928.

The spelling of 1266533 in words is "one million, two hundred sixty-six thousand, five hundred thirty-three".