1280704 has 14 divisors (see below), whose sum is σ = 2541524. Its totient is φ = 640320.

The previous prime is 1280693. The next prime is 1280707. The reversal of 1280704 is 4070821.

1280704 is a modest number, since divided by 704 gives 128 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1280707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9942 + ... + 10069.

2^1280704 is an apocalyptic number.

It is an amenable number.

1280704 is a deficient number, since it is larger than the sum of its proper divisors (1260820).

1280704 is an equidigital number, since it uses as much as digits as its factorization.

1280704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20023 (or 20013 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1280704 is about 1131.6819341140. The cubic root of 1280704 is about 108.5966067447.

The spelling of 1280704 in words is "one million, two hundred eighty thousand, seven hundred four".