1278116 has 18 divisors (see below), whose sum is σ = 2602278. Its totient is φ = 547680.

The previous prime is 1278113. The next prime is 1278131. The reversal of 1278116 is 6118721.

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 23716 = 1120^2 + 154^2 .

It is not an unprimeable number, because it can be changed into a prime (1278113) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3065 + ... + 3456.

It is an arithmetic number, because the mean of its divisors is an integer number (144571).

2^1278116 is an apocalyptic number.

It is an amenable number.

1278116 is an abundant number, since it is smaller than the sum of its proper divisors (1324162).

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

1278116 is a wasteful number, since it uses less digits than its factorization.

1278116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539 (or 6530 counting only the distinct ones).

The product of its digits is 672, while the sum is 26.

The square root of 1278116 is about 1130.5379250605. The cubic root of 1278116 is about 108.5234080609.

The spelling of 1278116 in words is "one million, two hundred seventy-eight thousand, one hundred sixteen".