1281326 has 4 divisors (see below), whose sum is σ = 1921992. Its totient is φ = 640662.

The previous prime is 1281317. The next prime is 1281331. The reversal of 1281326 is 6231821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6231821 = 61 ⋅102161.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 320330 + ... + 320333.

It is an arithmetic number, because the mean of its divisors is an integer number (480498).

2^1281326 is an apocalyptic number.

1281326 is a deficient number, since it is larger than the sum of its proper divisors (640666).

1281326 is an equidigital number, since it uses as much as digits as its factorization.

1281326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640665.

The product of its digits is 576, while the sum is 23.

The square root of 1281326 is about 1131.9567129533. The cubic root of 1281326 is about 108.6141846178.

The spelling of 1281326 in words is "one million, two hundred eighty-one thousand, three hundred twenty-six".