1287016 has 8 divisors (see below), whose sum is σ = 2413170. Its totient is φ = 643504.

The previous prime is 1287007. The next prime is 1287047. The reversal of 1287016 is 6107821.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 306916 = 990^2 + 554^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80431 + ... + 80446.

2^1287016 is an apocalyptic number.

1287016 is the 718-th centered pentagonal number.

It is an amenable number.

1287016 is a deficient number, since it is larger than the sum of its proper divisors (1126154).

1287016 is a wasteful number, since it uses less digits than its factorization.

1287016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160883 (or 160879 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1287016 is about 1134.4672758612. The cubic root of 1287016 is about 108.7747219966.

The spelling of 1287016 in words is "one million, two hundred eighty-seven thousand, sixteen".