1286915 has 16 divisors (see below), whose sum is σ = 1790208. Its totient is φ = 869856.

The previous prime is 1286881. The next prime is 1286939. The reversal of 1286915 is 5196821.

It is a cyclic number.

It is not a de Polignac number, because 1286915 - 2¹⁰ = 1285891 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2684 + ... + 3126.

It is an arithmetic number, because the mean of its divisors is an integer number (111888).

2^1286915 is an apocalyptic number.

1286915 is a deficient number, since it is larger than the sum of its proper divisors (503293).

1286915 is an equidigital number, since it uses as much as digits as its factorization.

1286915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its digits is 4320, while the sum is 32.

The square root of 1286915 is about 1134.4227607026. The cubic root of 1286915 is about 108.7718765167.

The spelling of 1286915 in words is "one million, two hundred eighty-six thousand, nine hundred fifteen".