1222278 has 8 divisors (see below), whose sum is σ = 2444568. Its totient is φ = 407424.

The previous prime is 1222271. The next prime is 1222279. The reversal of 1222278 is 8722221.

It is a happy number.

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

1222278 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222271) 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, 101851 + ... + 101862.

It is an arithmetic number, because the mean of its divisors is an integer number (305571).

2^1222278 is an apocalyptic number.

1222278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1222278 is a wasteful number, since it uses less digits than its factorization.

1222278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203718.

The product of its digits is 896, while the sum is 24.

The square root of 1222278 is about 1105.5668229465. The cubic root of 1222278 is about 106.9194374218.

Adding to 1222278 its reverse (8722221), we get a palindrome (9944499).

The spelling of 1222278 in words is "one million, two hundred twenty-two thousand, two hundred seventy-eight".