1278208 has 18 divisors (see below), whose sum is σ = 2551934. Its totient is φ = 638976.

The previous prime is 1278203. The next prime is 1278209. The reversal of 1278208 is 8028721.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 262144 = 1008^2 + 512^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1278203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2241 + ... + 2752.

2^1278208 is an apocalyptic number.

It is an amenable number.

1278208 is a deficient number, since it is larger than the sum of its proper divisors (1273726).

1278208 is an frugal number, since it uses more digits than its factorization.

1278208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009 (or 4995 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1278208 is about 1130.5786129235. The cubic root of 1278208 is about 108.5260118710.

The spelling of 1278208 in words is "one million, two hundred seventy-eight thousand, two hundred eight".