1284680 has 16 divisors (see below), whose sum is σ = 2890620. Its totient is φ = 513856.

The previous prime is 1284659. The next prime is 1284691. The reversal of 1284680 is 864821.

It can be written as a sum of positive squares in 2 ways, for example, as 1085764 + 198916 = 1042^2 + 446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16019 + ... + 16098.

2^1284680 is an apocalyptic number.

1284680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1284680 is an abundant number, since it is smaller than the sum of its proper divisors (1605940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1284680 is a wasteful number, since it uses less digits than its factorization.

1284680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32128 (or 32124 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1284680 is about 1133.4372501378. The cubic root of 1284680 is about 108.7088715748.

The spelling of 1284680 in words is "one million, two hundred eighty-four thousand, six hundred eighty".