1286464 has 14 divisors (see below), whose sum is σ = 2552954. Its totient is φ = 643200.

The previous prime is 1286447. The next prime is 1286489. The reversal of 1286464 is 4646821.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 270400 = 1008^2 + 520^2 .

It is an Ulam number.

1286464 is a modest number, since divided by 6464 gives 128 as remainder.

It is a congruent 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 as a sum of consecutive naturals, namely, 9987 + ... + 10114.

2^1286464 is an apocalyptic number.

It is an amenable number.

1286464 is a deficient number, since it is larger than the sum of its proper divisors (1266490).

1286464 is an equidigital number, since it uses as much as digits as its factorization.

1286464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20113 (or 20103 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 1286464 is about 1134.2239637744. The cubic root of 1286464 is about 108.7591686461.

The spelling of 1286464 in words is "one million, two hundred eighty-six thousand, four hundred sixty-four".