1042440223 has 4 divisors (see below), whose sum is σ = 1137207528. Its totient is φ = 947672920.

The previous prime is 1042440209. The next prime is 1042440227. The reversal of 1042440223 is 3220442401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3220442401 = 11 ⋅292767491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042440223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042440194 and 1042440203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042440227) 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, 47383636 + ... + 47383657.

It is an arithmetic number, because the mean of its divisors is an integer number (284301882).

Almost surely, 2^1042440223 is an apocalyptic number.

1042440223 is a deficient number, since it is larger than the sum of its proper divisors (94767305).

1042440223 is an equidigital number, since it uses as much as digits as its factorization.

1042440223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94767304.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1042440223 is about 32286.8428775562. The cubic root of 1042440223 is about 1013.9511998866.

Adding to 1042440223 its reverse (3220442401), we get a palindrome (4262882624).

The spelling of 1042440223 in words is "one billion, forty-two million, four hundred forty thousand, two hundred twenty-three".