1287304 has 16 divisors (see below), whose sum is σ = 2479500. Its totient is φ = 626112.

The previous prime is 1287289. The next prime is 1287323. The reversal of 1287304 is 4037821.

It can be written as a sum of positive squares in 2 ways, for example, as 1276900 + 10404 = 1130^2 + 102^2 .

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, 1879 + ... + 2470.

2^1287304 is an apocalyptic number.

It is an amenable number.

1287304 is a deficient number, since it is larger than the sum of its proper divisors (1192196).

1287304 is a wasteful number, since it uses less digits than its factorization.

1287304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392 (or 4388 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1287304 is about 1134.5942005845. The cubic root of 1287304 is about 108.7828350228.

The spelling of 1287304 in words is "one million, two hundred eighty-seven thousand, three hundred four".