1240423222 has 4 divisors (see below), whose sum is σ = 1860634836. Its totient is φ = 620211610.

The previous prime is 1240423199. The next prime is 1240423229. The reversal of 1240423222 is 2223240421.

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

It is a super-2 number, since 2×1240423222² = 3077299539353722568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1240423193 and 1240423202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240423229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310105804 + ... + 310105807.

It is an arithmetic number, because the mean of its divisors is an integer number (465158709).

Almost surely, 2^1240423222 is an apocalyptic number.

1240423222 is a deficient number, since it is larger than the sum of its proper divisors (620211614).

1240423222 is an equidigital number, since it uses as much as digits as its factorization.

1240423222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620211613.

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

The square root of 1240423222 is about 35219.6425592311. The cubic root of 1240423222 is about 1074.4592837214.

Adding to 1240423222 its reverse (2223240421), we get a palindrome (3463663643).

The spelling of 1240423222 in words is "one billion, two hundred forty million, four hundred twenty-three thousand, two hundred twenty-two".