1243040422 has 16 divisors (see below), whose sum is σ = 2011000320. Its totient is φ = 572850432.

The previous prime is 1243040413. The next prime is 1243040441. The reversal of 1243040422 is 2240403421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1243040393 and 1243040402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18022 + ... + 53017.

It is an arithmetic number, because the mean of its divisors is an integer number (125687520).

Almost surely, 2^1243040422 is an apocalyptic number.

1243040422 is a deficient number, since it is larger than the sum of its proper divisors (767959898).

1243040422 is a wasteful number, since it uses less digits than its factorization.

1243040422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71727.

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

The square root of 1243040422 is about 35256.7783837378. The cubic root of 1243040422 is about 1075.2144290478.

Adding to 1243040422 its reverse (2240403421), we get a palindrome (3483443843).

The spelling of 1243040422 in words is "one billion, two hundred forty-three million, forty thousand, four hundred twenty-two".