1278016 has 28 divisors (see below), whose sum is σ = 2672080. Its totient is φ = 604800.

The previous prime is 1278007. The next prime is 1278029. The reversal of 1278016 is 6108721.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 691 + ... + 1741.

2^1278016 is an apocalyptic number.

1278016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336040).

1278016 is an abundant number, since it is smaller than the sum of its proper divisors (1394064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278016 is a wasteful number, since it uses less digits than its factorization.

1278016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1278016 is about 1130.4936974614. The cubic root of 1278016 is about 108.5205776908.

It can be divided in two parts, 12780 and 16, that multiplied together give a triangular number (204480 = T₆₃₉).

The spelling of 1278016 in words is "one million, two hundred seventy-eight thousand, sixteen".