1288406 has 12 divisors (see below), whose sum is σ = 2248308. Its totient is φ = 552132.

The previous prime is 1288393. The next prime is 1288421. The reversal of 1288406 is 6048821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6476 + ... + 6671.

It is an arithmetic number, because the mean of its divisors is an integer number (187359).

2^1288406 is an apocalyptic number.

1288406 is a deficient number, since it is larger than the sum of its proper divisors (959902).

1288406 is a wasteful number, since it uses less digits than its factorization.

1288406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13163 (or 13156 counting only the distinct ones).

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

The square root of 1288406 is about 1135.0797328822. The cubic root of 1288406 is about 108.8138674474.

The spelling of 1288406 in words is "one million, two hundred eighty-eight thousand, four hundred six".