1281223 has 4 divisors (see below), whose sum is σ = 1298848. Its totient is φ = 1263600.

The previous prime is 1281221. The next prime is 1281229. The reversal of 1281223 is 3221821.

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 1281223 - 2¹ = 1281221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8703 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (324712).

2^1281223 is an apocalyptic number.

1281223 is a deficient number, since it is larger than the sum of its proper divisors (17625).

1281223 is an equidigital number, since it uses as much as digits as its factorization.

1281223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17624.

The product of its digits is 192, while the sum is 19.

The square root of 1281223 is about 1131.9112155995. The cubic root of 1281223 is about 108.6112742055.

The spelling of 1281223 in words is "one million, two hundred eighty-one thousand, two hundred twenty-three".