1280366 has 8 divisors (see below), whose sum is σ = 1930800. Its totient is φ = 636768.

The previous prime is 1280333. The next prime is 1280371. The reversal of 1280366 is 6630821.

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

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 in 3 ways as a sum of consecutive naturals, for example, 1211 + ... + 2006.

It is an arithmetic number, because the mean of its divisors is an integer number (241350).

2^1280366 is an apocalyptic number.

1280366 is a deficient number, since it is larger than the sum of its proper divisors (650434).

1280366 is a wasteful number, since it uses less digits than its factorization.

1280366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1280366 is about 1131.5325890137. The cubic root of 1280366 is about 108.5870523948.

The spelling of 1280366 in words is "one million, two hundred eighty thousand, three hundred sixty-six".