1428223 has 4 divisors (see below), whose sum is σ = 1435600. Its totient is φ = 1420848.

The previous prime is 1428209. The next prime is 1428233. The reversal of 1428223 is 3228241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1428223 - 2¹³ = 1420031 is a prime.

It is a Duffinian number.

1428223 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1428194 and 1428203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428233) 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, 3390 + ... + 3787.

It is an arithmetic number, because the mean of its divisors is an integer number (358900).

2^1428223 is an apocalyptic number.

1428223 is a deficient number, since it is larger than the sum of its proper divisors (7377).

1428223 is an equidigital number, since it uses as much as digits as its factorization.

1428223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7376.

The product of its digits is 768, while the sum is 22.

The square root of 1428223 is about 1195.0828423168. The cubic root of 1428223 is about 112.6156309046.

The spelling of 1428223 in words is "one million, four hundred twenty-eight thousand, two hundred twenty-three".