1287752 has 8 divisors (see below), whose sum is σ = 2414550. Its totient is φ = 643872.

The previous prime is 1287751. The next prime is 1287757. The reversal of 1287752 is 2577821.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 64516 = 1106^2 + 254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1287751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80477 + ... + 80492.

2^1287752 is an apocalyptic number.

It is an amenable number.

1287752 is a deficient number, since it is larger than the sum of its proper divisors (1126798).

1287752 is a wasteful number, since it uses less digits than its factorization.

1287752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160975 (or 160971 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 1287752 is about 1134.7916108255. The cubic root of 1287752 is about 108.7954528809.

The spelling of 1287752 in words is "one million, two hundred eighty-seven thousand, seven hundred fifty-two".