1286408 has 12 divisors (see below), whose sum is σ = 2418045. Its totient is φ = 641600.

The previous prime is 1286399. The next prime is 1286419. The reversal of 1286408 is 8046821.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 770884 + 515524 = 878^2 + 718^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=802.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3008 + ... + 3408.

2^1286408 is an apocalyptic number.

It is an amenable number.

1286408 is a deficient number, since it is larger than the sum of its proper divisors (1131637).

1286408 is an frugal number, since it uses more digits than its factorization.

1286408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1286408 is about 1134.1992770232. The cubic root of 1286408 is about 108.7575905214.

The spelling of 1286408 in words is "one million, two hundred eighty-six thousand, four hundred eight".