1287768 has 16 divisors (see below), whose sum is σ = 3219480. Its totient is φ = 429248.

The previous prime is 1287761. The next prime is 1287787. The reversal of 1287768 is 8677821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287761) 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, 26805 + ... + 26852.

2^1287768 is an apocalyptic number.

It is an amenable number.

1287768 is an abundant number, since it is smaller than the sum of its proper divisors (1931712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287768 is a wasteful number, since it uses less digits than its factorization.

1287768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53666 (or 53662 counting only the distinct ones).

The product of its digits is 37632, while the sum is 39.

The square root of 1287768 is about 1134.7986605561. The cubic root of 1287768 is about 108.7959034646.

The spelling of 1287768 in words is "one million, two hundred eighty-seven thousand, seven hundred sixty-eight".