1278223 has 4 divisors (see below), whose sum is σ = 1319488. Its totient is φ = 1236960.

The previous prime is 1278217. The next prime is 1278227. The reversal of 1278223 is 3228721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3228721 = 127 ⋅25423.

It is a cyclic number.

It is not a de Polignac number, because 1278223 - 2⁵ = 1278191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278227) 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, 20586 + ... + 20647.

It is an arithmetic number, because the mean of its divisors is an integer number (329872).

2^1278223 is an apocalyptic number.

1278223 is a deficient number, since it is larger than the sum of its proper divisors (41265).

1278223 is an equidigital number, since it uses as much as digits as its factorization.

1278223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41264.

The product of its digits is 1344, while the sum is 25.

The square root of 1278223 is about 1130.5852466754. The cubic root of 1278223 is about 108.5264363934.

The spelling of 1278223 in words is "one million, two hundred seventy-eight thousand, two hundred twenty-three".