1287344 has 20 divisors (see below), whose sum is σ = 2537040. Its totient is φ = 632640.

The previous prime is 1287343. The next prime is 1287347. The reversal of 1287344 is 4437821.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1287343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317 + ... + 1635.

It is an arithmetic number, because the mean of its divisors is an integer number (126852).

2^1287344 is an apocalyptic number.

It is an amenable number.

1287344 is a deficient number, since it is larger than the sum of its proper divisors (1249696).

1287344 is a wasteful number, since it uses less digits than its factorization.

1287344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388 (or 1382 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 1287344 is about 1134.6118278953. The cubic root of 1287344 is about 108.7839617363.

The spelling of 1287344 in words is "one million, two hundred eighty-seven thousand, three hundred forty-four".