1287112 has 16 divisors (see below), whose sum is σ = 2425500. Its totient is φ = 640320.

The previous prime is 1287109. The next prime is 1287131. The reversal of 1287112 is 2117821.

It can be written as a sum of positive squares in 2 ways, for example, as 1285956 + 1156 = 1134^2 + 34^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562 + ... + 3022.

2^1287112 is an apocalyptic number.

It is an amenable number.

1287112 is a deficient number, since it is larger than the sum of its proper divisors (1138388).

1287112 is a wasteful number, since it uses less digits than its factorization.

1287112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 812 counting only the distinct ones).

The product of its digits is 224, while the sum is 22.

The square root of 1287112 is about 1134.5095856801. The cubic root of 1287112 is about 108.7774264731. Note that the first 3 decimals are identical.

The spelling of 1287112 in words is "one million, two hundred eighty-seven thousand, one hundred twelve".