1287536 has 10 divisors (see below), whose sum is σ = 2494632. Its totient is φ = 643760.

The previous prime is 1287511. The next prime is 1287541. The reversal of 1287536 is 6357821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40220 + ... + 40251.

2^1287536 is an apocalyptic number.

1287536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1287536 is a deficient number, since it is larger than the sum of its proper divisors (1207096).

1287536 is an equidigital number, since it uses as much as digits as its factorization.

1287536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80479 (or 80473 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 1287536 is about 1134.6964351755. The cubic root of 1287536 is about 108.7893696361.

The spelling of 1287536 in words is "one million, two hundred eighty-seven thousand, five hundred thirty-six".