1278604 has 12 divisors (see below), whose sum is σ = 2369304. Its totient is φ = 601664.

The previous prime is 1278601. The next prime is 1278611. The reversal of 1278604 is 4068721.

It is not an unprimeable number, because it can be changed into a prime (1278601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9334 + ... + 9469.

It is an arithmetic number, because the mean of its divisors is an integer number (197442).

2^1278604 is an apocalyptic number.

It is an amenable number.

1278604 is a deficient number, since it is larger than the sum of its proper divisors (1090700).

1278604 is a wasteful number, since it uses less digits than its factorization.

1278604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18824 (or 18822 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1278604 is about 1130.7537309246. The cubic root of 1278604 is about 108.5372181491.

The spelling of 1278604 in words is "one million, two hundred seventy-eight thousand, six hundred four".