It is a sphenic number, since it is the product of 3 distinct primes.
1280886 is an admirable number.
It is an Ulam number.
It is a congruent number.
21280886 is an apocalyptic number.
1280886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1280886 is a wasteful number, since it uses less digits than its factorization.
1280886 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 213486.
The square root of 1280886 is about 1131.7623425437. The cubic root of 1280886 is about 108.6017506984.
The spelling of 1280886 in words is "one million, two hundred eighty thousand, eight hundred eighty-six".