1280726 has 4 divisors (see below), whose sum is σ = 1921092. Its totient is φ = 640362.

The previous prime is 1280707. The next prime is 1280737. The reversal of 1280726 is 6270821.

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

It is a junction number, because it is equal to n+sod(n) for n = 1280695 and 1280704.

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, 320180 + ... + 320183.

It is an arithmetic number, because the mean of its divisors is an integer number (480273).

2^1280726 is an apocalyptic number.

1280726 is a deficient number, since it is larger than the sum of its proper divisors (640366).

1280726 is an equidigital number, since it uses as much as digits as its factorization.

1280726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640365.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1280726 is about 1131.6916541179. The cubic root of 1280726 is about 108.5972285672.

The spelling of 1280726 in words is "one million, two hundred eighty thousand, seven hundred twenty-six".