1278226 has 8 divisors (see below), whose sum is σ = 1946160. Its totient is φ = 629508.

The previous prime is 1278217. The next prime is 1278227. The reversal of 1278226 is 6228721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1278226³ = 6265333543166781528, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1278194 and 1278203.

It is not an unprimeable number, because it can be changed into a prime (1278227) 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 3 ways as a sum of consecutive naturals, for example, 4636 + ... + 4903.

It is an arithmetic number, because the mean of its divisors is an integer number (243270).

2^1278226 is an apocalyptic number.

1278226 is a deficient number, since it is larger than the sum of its proper divisors (667934).

1278226 is an equidigital number, since it uses as much as digits as its factorization.

1278226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608.

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

The square root of 1278226 is about 1130.5865734211. The cubic root of 1278226 is about 108.5265212974.

The spelling of 1278226 in words is "one million, two hundred seventy-eight thousand, two hundred twenty-six".