1278856 has 8 divisors (see below), whose sum is σ = 2397870. Its totient is φ = 639424.

The previous prime is 1278839. The next prime is 1278857. The reversal of 1278856 is 6588721.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 133956 = 1070^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1278857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79921 + ... + 79936.

2^1278856 is an apocalyptic number.

It is an amenable number.

1278856 is a deficient number, since it is larger than the sum of its proper divisors (1119014).

1278856 is a wasteful number, since it uses less digits than its factorization.

1278856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159863 (or 159859 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 1278856 is about 1130.8651555336. The cubic root of 1278856 is about 108.5443482124.

The spelling of 1278856 in words is "one million, two hundred seventy-eight thousand, eight hundred fifty-six".