1287896 has 32 divisors (see below), whose sum is σ = 2622000. Its totient is φ = 590976.

The previous prime is 1287887. The next prime is 1287899. The reversal of 1287896 is 6987821.

It is a super-2 number, since 2×1287896² = 3317352213632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287899) 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 7 ways as a sum of consecutive naturals, for example, 5510 + ... + 5738.

2^1287896 is an apocalyptic number.

It is an amenable number.

1287896 is an abundant number, since it is smaller than the sum of its proper divisors (1334104).

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

1287896 is a wasteful number, since it uses less digits than its factorization.

1287896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 287 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 1287896 is about 1134.8550568244. The cubic root of 1287896 is about 108.7995079995.

The spelling of 1287896 in words is "one million, two hundred eighty-seven thousand, eight hundred ninety-six".