1278678 has 16 divisors (see below), whose sum is σ = 2606256. Its totient is φ = 418080.

The previous prime is 1278671. The next prime is 1278701. The reversal of 1278678 is 8768721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1693 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (162891).

2^1278678 is an apocalyptic number.

1278678 is an abundant number, since it is smaller than the sum of its proper divisors (1327578).

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

1278678 is a wasteful number, since it uses less digits than its factorization.

1278678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079.

The product of its digits is 37632, while the sum is 39.

The square root of 1278678 is about 1130.7864519882. The cubic root of 1278678 is about 108.5393119950.

The spelling of 1278678 in words is "one million, two hundred seventy-eight thousand, six hundred seventy-eight".