1287628 has 12 divisors (see below), whose sum is σ = 2261392. Its totient is φ = 641520.

The previous prime is 1287623. The next prime is 1287661. The reversal of 1287628 is 8267821.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1287593 and 1287602.

It is not an unprimeable number, because it can be changed into a prime (1287623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618 + ... + 2278.

2^1287628 is an apocalyptic number.

It is an amenable number.

1287628 is a deficient number, since it is larger than the sum of its proper divisors (973764).

1287628 is a wasteful number, since it uses less digits than its factorization.

1287628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1150 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 1287628 is about 1134.7369739283. The cubic root of 1287628 is about 108.7919607310.

The spelling of 1287628 in words is "one million, two hundred eighty-seven thousand, six hundred twenty-eight".