1001223 has 12 divisors (see below), whose sum is σ = 1474200. Its totient is φ = 654576.

The previous prime is 1001219. The next prime is 1001237. The reversal of 1001223 is 3221001.

It is a happy number.

It is not a de Polignac number, because 1001223 - 2² = 1001219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001023) 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 11 ways as a sum of consecutive naturals, for example, 573 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

2^1001223 is an apocalyptic number.

1001223 is a deficient number, since it is larger than the sum of its proper divisors (472977).

1001223 is a wasteful number, since it uses less digits than its factorization.

1001223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2155 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1001223 is about 1000.6113131481. The cubic root of 1001223 is about 100.0407500587.

Adding to 1001223 its reverse (3221001), we get a palindrome (4222224).

The spelling of 1001223 in words is "one million, one thousand, two hundred twenty-three".