1280926 has 4 divisors (see below), whose sum is σ = 1921392. Its totient is φ = 640462.

The previous prime is 1280921. The next prime is 1280947. The reversal of 1280926 is 6290821.

It is a happy number.

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 = 1280894 and 1280903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320230 + ... + 320233.

It is an arithmetic number, because the mean of its divisors is an integer number (480348).

2^1280926 is an apocalyptic number.

1280926 is a deficient number, since it is larger than the sum of its proper divisors (640466).

1280926 is an equidigital number, since it uses as much as digits as its factorization.

1280926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640465.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1280926 is about 1131.7800139603. The cubic root of 1280926 is about 108.6028811724.

The spelling of 1280926 in words is "one million, two hundred eighty thousand, nine hundred twenty-six".