1280806 has 8 divisors (see below), whose sum is σ = 1933920. Its totient is φ = 636168.

The previous prime is 1280803. The next prime is 1280821. The reversal of 1280806 is 6080821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726 + ... + 2353.

It is an arithmetic number, because the mean of its divisors is an integer number (241740).

2^1280806 is an apocalyptic number.

1280806 is a deficient number, since it is larger than the sum of its proper divisors (653114).

1280806 is a wasteful number, since it uses less digits than its factorization.

1280806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1280806 is about 1131.7269988827. The cubic root of 1280806 is about 108.5994896799.

The spelling of 1280806 in words is "one million, two hundred eighty thousand, eight hundred six".