1240042223 has 16 divisors (see below), whose sum is σ = 1444039680. Its totient is φ = 1042924896.

The previous prime is 1240042189. The next prime is 1240042229. The reversal of 1240042223 is 3222400421.

It is a cyclic number.

It is not a de Polignac number, because 1240042223 - 2¹⁶ = 1239976687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240042195 and 1240042204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240042229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83261 + ... + 97017.

It is an arithmetic number, because the mean of its divisors is an integer number (90252480).

Almost surely, 2^1240042223 is an apocalyptic number.

1240042223 is a deficient number, since it is larger than the sum of its proper divisors (203997457).

1240042223 is a wasteful number, since it uses less digits than its factorization.

1240042223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14006.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1240042223 is about 35214.2332445277. The cubic root of 1240042223 is about 1074.3492648651.

Adding to 1240042223 its reverse (3222400421), we get a palindrome (4462442644).

The spelling of 1240042223 in words is "one billion, two hundred forty million, forty-two thousand, two hundred twenty-three".